docs: blog post: remeasure on develop with #6029 , #6031 , #6033 and #6039

Rerun on develop 7fc8312c64 with the open pull requests #6029, #6031, #6033 and #6039 merged, measured on November 7: the suite (median of 12 runs, now 3.3x), the timeline (358 commits, #6031 shown as a pending step on the candidate, #6028 labeled, a tick for November), the compile times, the stream gap, the allocator check and the comparison on the Mac and on x86-64, including the held-out files. The comparison now leaves out the "copy untimed" variants, as the post describes, and the held-out chart no longer counts json::accept() as another library. Appendix D, the Intel column of Appendix B and the GCC 16/Clang 23 check on the Mac are still from November 3. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
docs: blog post: describe the performance work of #6020 , #6028-#6031 and #6033
2026-11-08 16:11:15 +00:00 · 2026-11-08 08:39:32 +01:00 · 2026-11-07 15:38:19 +01:00 · 2026-11-07 14:55:50 +01:00 · 2026-11-07 14:54:11 +01:00 · 2026-11-07 14:27:52 +01:00
194 changed files with 98114 additions and 3429 deletions
@@ -154,11 +154,6 @@ and each page's title (H1) and declaration by
 [`docs/docset/generate_docset.py`](https://github.com/nlohmann/json/blob/develop/docs/docset/generate_docset.py);
 `make build` reports API pages that cannot be classified.

-A pull request that changes only the documentation, Markdown files, GitHub metadata, or license files skips the
-compiler workflows (Ubuntu, macOS, Windows); the documentation and license checks still run. See
-[`tools/check_path_filters`](https://github.com/nlohmann/json/tree/develop/tools/check_path_filters) for the list of
-skipped files and what to do when a compiler job starts reading one of them.
-
 ### Amalgamate the source code

 The single-header files
@@ -24,11 +24,11 @@ jobs:
    permissions:
      actions: write

-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04

    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -19,10 +19,10 @@ permissions:
 jobs:
  save:
    if: github.event_name == 'pull_request'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -46,7 +46,7 @@ jobs:

    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -16,11 +16,11 @@ concurrency:
 jobs:
  check_docs_links:
    if: github.repository == 'nlohmann/json'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    timeout-minutes: 30
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -13,7 +13,7 @@ jobs:
    runs-on: ubuntu-22.04
    steps:
    - name: Harden Runner
-      uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+      uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
      with:
        egress-policy: audit

@@ -27,7 +27,7 @@ jobs:

    steps:
    - name: Harden Runner
-      uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+      uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
      with:
        egress-policy: audit

@@ -12,7 +12,7 @@ jobs:
  comment:
    # push runs on develop have no PR to comment on (and no "pr" artifact)
    if: ${{ github.event.workflow_run.conclusion == 'failure' && github.event.workflow_run.event == 'pull_request' }}
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    permissions:
      contents: read
      actions: read
@@ -20,7 +20,7 @@ jobs:
      pull-requests: write
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -18,10 +18,10 @@ permissions:

 jobs:
  dependency-review:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -24,14 +24,14 @@ on:
 jobs:
  flawfinder:
    name: Flawfinder
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    permissions:
      actions: read
      contents: read
      security-events: write
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -54,7 +54,7 @@ jobs:
    timeout-minutes: 60
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -19,11 +19,11 @@ jobs:
      contents: read
      pull-requests: write

-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04

    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -7,25 +7,6 @@ on:
      - master
      - release/*
  pull_request:
-    # Skip pull requests that change only files no job here reads. The list is checked by
-    # tools/check_path_filters/check_path_filters.py (repository_checks.yml); change both together.
-    paths:
-      - '**'
-      - '!docs/**'
-      - '!**.md'
-      - '!.github/*'
-      - '!.github/ISSUE_TEMPLATE/**'
-      - '!.github/external_ci/**'
-      - '!.github/workflows/**'
-      - '!.reuse/**'
-      - '!LICENSES/**'
-      - '!CITATION.cff'
-      - '!REUSE.toml'
-      # read by tools/check_build_options in the ci_meson_install job (ubuntu.yml)
-      - 'docs/mkdocs/docs/integration/package_managers.md'
-      # built by the swiftpm job (macos.yml)
-      - 'docs/mkdocs/docs/integration/swift/**'
-      - '.github/workflows/macos.yml'
  workflow_dispatch:

 concurrency:
@@ -34,10 +34,10 @@ jobs:
      contents: write

    if: github.repository == 'nlohmann/json'
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -1,78 +0,0 @@
-name: Repository checks
-
-# Checks that concern files the compiler workflows (ubuntu.yml, macos.yml,
-# windows.yml) skip with their path filter: the documentation, the license
-# information, and the path filter itself. This workflow has no path filter.
-on:
-  push:
-    branches:
-      - develop
-      - master
-      - release/*
-  pull_request:
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
-  cancel-in-progress: true
-
-jobs:
-  check_path_filters:
-    runs-on: ubuntu-26.04
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
-        with:
-          egress-policy: audit
-
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-      - name: Check the path filters of the compiler workflows
-        run: python3 tools/check_path_filters/check_path_filters.py
-
-  ci_reuse_compliance:
-    runs-on: ubuntu-26.04
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
-        with:
-          egress-policy: audit
-
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
-      - name: Run CMake
-        run: cmake -S . -B build -DJSON_CI=On
-      - name: Build
-        run: cmake --build build --target ci_reuse_compliance
-
-  ci_test_documentation:
-    runs-on: ubuntu-26.04
-    strategy:
-      matrix:
-        target: [ci_test_examples, ci_test_build_documentation, ci_test_documentation_mermaid]
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
-        with:
-          egress-policy: audit
-
-      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
-        with:
-          persist-credentials: false
-          # the git-revision-date-localized plugin needs the history; a shallow clone makes the strict build fail
-          fetch-depth: ${{ matrix.target == 'ci_test_build_documentation' && '0' || '1' }}
-      - uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
-        if: matrix.target == 'ci_test_documentation_mermaid'
-        with:
-          node-version: 24
-      - name: Run CMake
-        run: cmake -S . -B build -DJSON_CI=On
-      - name: Build
-        run: cmake --build build --target ${{ matrix.target }}
@@ -24,7 +24,7 @@ permissions:
 jobs:
  analysis:
    name: Scorecard analysis
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    permissions:
      # Needed to upload the results to code-scanning dashboard.
      security-events: write
@@ -40,7 +40,7 @@ jobs:

    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -36,7 +36,7 @@ jobs:
    runs-on: ubuntu-26.04
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -8,7 +8,7 @@ permissions:

 jobs:
  stale:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04

    permissions:
      issues: write
@@ -16,7 +16,7 @@ jobs:

    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -7,25 +7,6 @@ on:
      - master
      - release/*
  pull_request:
-    # Skip pull requests that change only files no job here reads. The list is checked by
-    # tools/check_path_filters/check_path_filters.py (repository_checks.yml); change both together.
-    paths:
-      - '**'
-      - '!docs/**'
-      - '!**.md'
-      - '!.github/*'
-      - '!.github/ISSUE_TEMPLATE/**'
-      - '!.github/external_ci/**'
-      - '!.github/workflows/**'
-      - '!.reuse/**'
-      - '!LICENSES/**'
-      - '!CITATION.cff'
-      - '!REUSE.toml'
-      # read by tools/check_build_options in the ci_meson_install job (ubuntu.yml)
-      - 'docs/mkdocs/docs/integration/package_managers.md'
-      # built by the swiftpm job (macos.yml)
-      - 'docs/mkdocs/docs/integration/swift/**'
-      - '.github/workflows/ubuntu.yml'
  workflow_dispatch:

 permissions:
@@ -37,14 +18,14 @@ concurrency:

 jobs:
  ci_test_gcc:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    container: gcc:latest
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
@@ -57,7 +38,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Check that Meson and pkg-config offer the CMake options
        run: make check_build_options
      - name: Install Meson
@@ -99,7 +80,7 @@ jobs:
    runs-on: ubuntu-26.04
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -111,7 +92,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
@@ -128,10 +109,10 @@ jobs:
    runs-on: ubuntu-26.04
    strategy:
      matrix:
-        target: [ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_test_valgrind]
+        target: [ci_test_single_header, ci_cppcheck, ci_cpplint, ci_reproducible_tests, ci_non_git_tests, ci_offline_testdata, ci_reuse_compliance, ci_test_valgrind]
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -142,14 +123,14 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
        run: cmake --build build --target ${{ matrix.target }}

  ci_static_analysis_clang:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    container: silkeh/clang:22
    strategy:
      matrix:
@@ -161,14 +142,14 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
        run: cmake --build build --target ${{ matrix.target }}

  ci_cmake_options:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    container: ubuntu:24.04
    strategy:
      matrix:
@@ -187,7 +168,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
@@ -197,7 +178,7 @@ jobs:
    runs-on: ubuntu-26.04
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -228,7 +209,7 @@ jobs:
          fail-on-error: false

  ci_test_compilers_gcc_old:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    strategy:
      matrix:
        compiler: ['4.8', '4.9', '5', '6']
@@ -263,14 +244,14 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: CXX=g++-${{ matrix.compiler }} cmake -S . -B build -DJSON_CI=On
      - name: Build
        run: cmake --build build --target ci_test_compiler_g++-${{ matrix.compiler }}

  ci_test_compilers_gcc:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    strategy:
      matrix:
        # older GCC docker images (4, 5, 6) fail to check out code
@@ -281,14 +262,14 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
        run: cmake --build build --target ci_test_compiler_default

  ci_test_compilers_clang:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    strategy:
      matrix:
        compiler: ['3.4', '3.5', '3.6', '3.7', '3.8', '3.9', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15-bullseye', '16', '17', '18', '19', '20', '21', '22', 'latest']
@@ -298,7 +279,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Disable filesystem support (std::filesystem is unusable) for clang 7 / 8 / 9 / 10
        run: echo "JSON_FORCED_GLOBAL_COMPILE_OPTIONS=-DJSON_HAS_FILESYSTEM=0;-DJSON_HAS_EXPERIMENTAL_FILESYSTEM=0" >> "$GITHUB_ENV"
        if: ${{ matrix.compiler == '7' || matrix.compiler == '8' || matrix.compiler == '9' || matrix.compiler == '10' }}
@@ -308,7 +289,7 @@ jobs:
        run: cmake --build build --target ci_test_compiler_default

  ci_test_standards_gcc:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    container: gcc:latest
    strategy:
      matrix:
@@ -318,14 +299,14 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
        run: cmake --build build --target ci_test_gcc_cxx${{ matrix.standard }}

  ci_test_standards_clang:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    container: silkeh/clang:latest
    strategy:
      matrix:
@@ -338,7 +319,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build with libc++
@@ -349,7 +330,7 @@ jobs:
        if: ${{ matrix.stdlib == 'libstdcxx' }}

  ci_cuda_example:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    strategy:
      fail-fast: false
      matrix:
@@ -365,7 +346,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
@@ -375,7 +356,7 @@ jobs:
    strategy:
      matrix:
        container: ['gcc:latest', 'silkeh/clang:latest']
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    container: ${{ matrix.container }}
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
@@ -385,7 +366,7 @@ jobs:
      # import-std support. Its opt-in token is CMake-version-specific, so pin
      # CMake to the version whose token is set in tests/module_cpp20/CMakeLists.txt.
      - name: Get pinned CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
        with:
          cmakeVersion: 4.3.4
      # Clang: the std library module is provided by libc++ (the image's libstdc++
@@ -402,7 +383,7 @@ jobs:
        run: cmake --build build --target ci_module_cpp20

  ci_icpc:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    # Intel discontinued the classic icc/icpc compiler in oneAPI 2024.0; this is
    # Intel's own last officially published image that still includes it.
    container: intel/oneapi-hpckit:2023.2.1-devel-ubuntu22.04
@@ -411,7 +392,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
@@ -421,28 +402,28 @@ jobs:
        run: cmake --build build --target ci_icpc

  ci_icpx:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    container: intel/oneapi-hpckit:latest
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
        run: cmake --build build --target ci_icpx

  ci_nvhpc:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-26.04
    container: nvcr.io/nvidia/nvhpc:25.5-devel-cuda12.9-ubuntu22.04
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DJSON_CI=On
      - name: Build
@@ -452,7 +433,7 @@ jobs:
    runs-on: ubuntu-26.04
    steps:
      - name: Harden Runner
-        uses: step-security/harden-runner@dc2769abcc0fcfbadfc1df54081c1608579ef6b2 # v2.22.2
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
        with:
          egress-policy: audit

@@ -462,12 +443,37 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Run CMake
        run: cmake -S . -B build -DCMAKE_TOOLCHAIN_FILE=$EMSDK/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake -GNinja
      - name: Build
        run: cmake --build build

+  ci_test_documentation:
+    runs-on: ubuntu-26.04
+    strategy:
+      matrix:
+        target: [ci_test_examples, ci_test_build_documentation, ci_test_documentation_mermaid]
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@46b06cea07f9e64621fdf066ba77ac6915163d43 # v2.22.3
+        with:
+          egress-policy: audit
+
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
+          # the git-revision-date-localized plugin needs the history; a shallow clone makes the strict build fail
+          fetch-depth: ${{ matrix.target == 'ci_test_build_documentation' && '0' || '1' }}
+      - uses: actions/setup-node@949feb2413d6458794dcd2491c4babbbce0c15c1 # v7.1.0
+        if: matrix.target == 'ci_test_documentation_mermaid'
+        with:
+          node-version: 24
+      - name: Run CMake
+        run: cmake -S . -B build -DJSON_CI=On
+      - name: Build
+        run: cmake --build build --target ${{ matrix.target }}
+
  # Native Linux ARM64 runner with the latest GCC. The ubuntu-24.04-arm label is
  # only available for public repositories.
  ci_test_arm64:
@@ -478,7 +484,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Check that the job runs natively on arm64
        run: uname -m && test "$(uname -m)" = aarch64
      - name: Run CMake
@@ -7,25 +7,6 @@ on:
      - master
      - release/*
  pull_request:
-    # Skip pull requests that change only files no job here reads. The list is checked by
-    # tools/check_path_filters/check_path_filters.py (repository_checks.yml); change both together.
-    paths:
-      - '**'
-      - '!docs/**'
-      - '!**.md'
-      - '!.github/*'
-      - '!.github/ISSUE_TEMPLATE/**'
-      - '!.github/external_ci/**'
-      - '!.github/workflows/**'
-      - '!.reuse/**'
-      - '!LICENSES/**'
-      - '!CITATION.cff'
-      - '!REUSE.toml'
-      # read by tools/check_build_options in the ci_meson_install job (ubuntu.yml)
-      - 'docs/mkdocs/docs/integration/package_managers.md'
-      # built by the swiftpm job (macos.yml)
-      - 'docs/mkdocs/docs/integration/swift/**'
-      - '.github/workflows/windows.yml'
  workflow_dispatch:

 permissions:
@@ -109,7 +90,7 @@ jobs:
        with:
          persist-credentials: false
      - name: Get latest CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
      - name: Set extra CXX_FLAGS for latest std_version
        # /wd5285 silences C5285 emitted by the bundled third-party doctest.h, which
        # specializes std::tuple (newly diagnosed by the VS2026 v145 toolset)
@@ -235,7 +216,7 @@ jobs:
      # import-std support. Its opt-in token is CMake-version-specific, so pin
      # CMake to the version whose token is set in tests/module_cpp20/CMakeLists.txt.
      - name: Get pinned CMake and ninja
-        uses: lukka/get-cmake@a89e43e22a96abafcd7a62db652a65ecd33052c9 # v4.4.4
+        uses: lukka/get-cmake@f86dd60acae0d132056913e248bdabf0e0580b7a # v4.4.5
        with:
          cmakeVersion: 4.3.4
      # CMAKE_CXX_FLAGS replaces CMake's MSVC defaults (which include /EHsc), and
@@ -348,20 +348,20 @@ add_custom_target(ci_test_no_thread_local

 add_custom_target(ci_test_coverage
    COMMAND CXX=g++ ${CMAKE_COMMAND}
-        -DCMAKE_BUILD_TYPE=Debug -GNinja -DCMAKE_CXX_FLAGS="--coverage;-fprofile-arcs;-ftest-coverage"
+        -DCMAKE_BUILD_TYPE=Debug -GNinja -DCMAKE_CXX_FLAGS="--coverage;-fprofile-arcs;-ftest-coverage;-fvar-tracking-assignments"
        -DJSON_BuildTests=ON
        -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_coverage
    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_coverage
    COMMAND cd ${PROJECT_BINARY_DIR}/build_coverage && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure

    COMMAND CXX=g++ ${CMAKE_COMMAND}
-        -DCMAKE_BUILD_TYPE=Debug -GNinja -DCMAKE_CXX_FLAGS="-m32;--coverage;-fprofile-arcs;-ftest-coverage"
+        -DCMAKE_BUILD_TYPE=Debug -GNinja -DCMAKE_CXX_FLAGS="-m32;--coverage;-fprofile-arcs;-ftest-coverage;-fvar-tracking-assignments"
        -DJSON_BuildTests=ON -DJSON_32bitTest=ONLY
        -S${PROJECT_SOURCE_DIR} -B${PROJECT_BINARY_DIR}/build_coverage32
    COMMAND ${CMAKE_COMMAND} --build ${PROJECT_BINARY_DIR}/build_coverage32
    COMMAND cd ${PROJECT_BINARY_DIR}/build_coverage32 && ${CMAKE_CTEST_COMMAND} --parallel ${N} --output-on-failure

-    COMMAND ${LCOV_TOOL} --directory . --capture --output-file json.info --rc branch_coverage=1 --rc geninfo_unexecuted_blocks=1 --ignore-errors mismatch --ignore-errors unused --ignore-errors inconsistent
+    COMMAND ${LCOV_TOOL} --directory . --capture --output-file json.info --rc branch_coverage=1 --ignore-errors mismatch --ignore-errors unused --ignore-errors inconsistent
    COMMAND ${LCOV_TOOL} -e json.info ${SRC_FILES} --output-file json.info.filtered --rc branch_coverage=1 --ignore-errors unused --ignore-errors inconsistent
    COMMAND ${CMAKE_SOURCE_DIR}/tests/thirdparty/imapdl/filterbr.py json.info.filtered > json.info.filtered.noexcept
    COMMAND ${GENHTML_TOOL} --title "JSON for Modern C++" --legend --demangle-cpp --output-directory html --show-details --branch-coverage --ignore-errors inconsistent json.info.filtered.noexcept
@@ -178,8 +178,10 @@ function(_json_test_add_test test_name file main cxx_standard)
            COMMAND ${memcheck_command} $<TARGET_FILE:${test_target}> ${DOCTEST_TEST_FILTER}
            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        )
+        # under Valgrind the slowest tests take close to 25 minutes, so ctest's
+        # default timeout of 1500 seconds leaves no headroom
        set_tests_properties(${test_target}_valgrind PROPERTIES
-            LABELS "valgrind" FIXTURES_REQUIRED TEST_DATA
+            LABELS "valgrind" FIXTURES_REQUIRED TEST_DATA TIMEOUT 3600
        )
    endif()
 endfunction()
@@ -120,6 +120,16 @@ overload (3).
    See [Number conversion](../../features/types/number_handling.md#number-conversion)
    for more information.

+!!! note "Booleans as numbers"
+
+    A JSON boolean converts to `#!cpp 0` or `#!cpp 1` for every arithmetic type **except** [`number_integer_t`](number_integer_t.md),
+    [`number_unsigned_t`](number_unsigned_t.md) and [`number_float_t`](number_float_t.md) (by default `#!cpp std::int64_t`,
+    `#!cpp std::uint64_t`, and `#!cpp double`), for which `#!cpp get<T>()` throws
+    [`type_error.302`](../../home/exceptions.md#jsonexceptiontype_error302) ("type must be number, but is boolean"). So
+    `#!cpp json(true).get<int>()` is `#!cpp 1`, while `#!cpp json(true).get<std::int64_t>()` and
+    `#!cpp json(true).get<double>()` throw. This is the behavior of all 3.x versions;
+    [`basic_json_view::get<T>()`](../basic_json_view/get.md) behaves the same.
+
 !!! note "`std::optional` conversions"

    Prior to version 3.13.0, `#!cpp get<std::optional<T>>()` (and other conversions to `std::optional<T>`) failed to
@@ -65,7 +65,12 @@ the same index, which is now a different value.

 ## Exception safety

-Strong exception safety: if an exception occurs, the original value stays intact.
+Overload (1) gives the strong guarantee: if an exception is thrown, there are no changes in the JSON value.
+
+Overloads (2) to (5) give the basic guarantee: if an exception is thrown while the elements or members are copied
+(for example, `std::bad_alloc`), the JSON value may be partially modified, but it stays a valid array or object.
+
+The exceptions listed below are thrown before the JSON value is changed.

 ## Exceptions

@@ -15,7 +15,9 @@ the patch. This function applies a JSON patch in place and returns void.

 ## Exception safety

-No guarantees, value may be corrupted by an unsuccessful patch operation.
+No guarantees: if an operation fails, the operations before it stay applied, and a failing `move` operation may already
+have removed the value at its "from" location. Use [`patch`](patch.md) if the value must be unchanged after a failed
+patch.

 ## Exceptions

@@ -62,8 +64,19 @@ the JSON value, the complexity can usually be neglected.
 ## Notes

 Unlike [`patch`](patch.md), `patch_inplace` applies the operation "in place" and no copy of the JSON value is created.
-That makes it faster for large documents by avoiding the copy. However, the JSON value might be corrupted if the
-function throws an exception.
+That makes it faster for large documents by avoiding the copy.
+
+!!! warning "Not atomic"
+
+    `patch_inplace` applies the operations one after the other and does not undo them when one fails. After an
+    exception, the value holds the result of the operations before the failing one, and a failing `move` operation
+    (a "remove" followed by an "add") may already have removed the value at its "from" location; see the second example
+    below. [RFC 6902](https://tools.ietf.org/html/rfc6902#section-5) requires that a patch with a failing operation is
+    not deemed successful, but leaves open what happens to the document.
+
+    If the value must stay unchanged when the patch fails, use [`patch`](patch.md), which applies the patch to a copy:
+    `#!cpp j = j.patch(json_patch);`. Validating the patch beforehand is not enough, as "test" operations and missing
+    paths are only detected while the patch is applied.

 Duplicate member names inside an operation object are resolved by the parser before the patch is applied (the last one
 is kept, see [`object_t`](object_t.md#behavior)), so `#!json {"op": "add", "op": "remove", "path": "/a"}` is a
@@ -13,9 +13,15 @@ function never throws an exception for invalid input, and the returned `#!cpp bo
 is returned.

 The result is the same as that of `BasicJsonType::accept()` by design; the difference is how the check is made. This
-function runs the document's index builder (and discards the index), while `BasicJsonType::accept()` runs the SAX
-parser with a handler that ignores every event. Use this one if you go on to parse the same input with
-[`parse()`](parse.md) anyway, so that both use the same code; either is fine for a plain yes/no answer.
+function runs the document's builder, which checks the text as [`parse()`](parse.md) does, while
+`BasicJsonType::accept()` runs the SAX parser with a handler that ignores every event. Use this one if you go on to
+parse the same input with [`parse()`](parse.md) anyway, so that both use the same code; either is fine for a plain
+yes/no answer.
+
+When both `ignore_comments` and `ignore_trailing_commas` are `#!cpp false` (the default), the builder writes no index.
+With either option set, it builds the index as [`parse()`](parse.md) does and discards it: the result is the same, only
+the time differs. (Neither option needs the index; the variant that skips it exists only for the default options to
+keep the code size down.)

 ## Template parameters

@@ -68,9 +68,10 @@ Strong guarantee: there are no changes to the view or the document it refers to.
    - Throws [`out_of_range.404`](../../home/exceptions.md#jsonexceptionout_of_range404) if `ptr` cannot be resolved
      because a reference token is used on a primitive value.

-None of these exceptions carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
-`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
-`JSON_DIAGNOSTICS` enabled.
+As for `BasicJsonType`, with [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) these exceptions name the JSON
+Pointer path of the value within the document, and with
+[`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md) its bytes in the source text (when
+[`materialize()`](materialize.md) sets them).

 ## Complexity

@@ -20,9 +20,9 @@ Strong guarantee: there are no changes to the view or the document it refers to.
 Throws [`invalid_iterator.214`](../../home/exceptions.md#jsonexceptioninvalid_iterator214) if the view is
 [null](is_null.md) or [discarded](is_discarded.md), or if it is an empty array or object.

-This exception does not carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
-`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
-`JSON_DIAGNOSTICS` enabled.
+As for `BasicJsonType`, with [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) the exception names the JSON Pointer
+path of the value within the document, and with [`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md)
+its bytes in the source text (when [`materialize()`](materialize.md) sets them).

 ## Complexity

@@ -20,9 +20,9 @@ Strong guarantee: there are no changes to the view or the document it refers to.
 Throws [`invalid_iterator.214`](../../home/exceptions.md#jsonexceptioninvalid_iterator214) if the view is
 [null](is_null.md) or [discarded](is_discarded.md), or if it is an empty array or object.

-This exception does not carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
-`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
-`JSON_DIAGNOSTICS` enabled.
+As for `BasicJsonType`, with [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) the exception names the JSON Pointer
+path of the value within the document, and with [`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md)
+its bytes in the source text (when [`materialize()`](materialize.md) sets them).

 ## Complexity

@@ -11,7 +11,8 @@ For the types below, the conversion works directly on the flat index — no `Bas

 - `#!cpp bool`
 - arithmetic types other than `#!cpp bool` (for a boolean, `#!cpp 0`/`#!cpp 1`, exactly as for
-  [`BasicJsonType::get<T>()`](../basic_json/get.md))
+  [`BasicJsonType::get<T>()`](../basic_json/get.md#notes), except for `number_integer_t`, `number_unsigned_t` and
+  `number_float_t`, which throw `type_error.302` for a boolean, as `BasicJsonType::get<T>()` does)
 - `#!cpp std::nullptr_t`
 - `#!cpp std::basic_string<char, Traits, Alloc>` (including `string_t`) — a copy of the string
 - [`string_view_t`](index.md#member-types) — **no copy**: the returned view points into the document's
@@ -80,14 +81,13 @@ Strong guarantee: there are no changes to the view or the document it refers to.
 - For every other `T`: whatever [`materialize().get<T>()`](../basic_json/get.md) throws — typically `type_error.302`,
  or whatever a user-provided `from_json()` throws.

-None of the exceptions thrown directly by this function or by a `from_json()` that reads the view (the first four
-bullets above) carry a
-[`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no `BasicJsonType` value to point at. An
-exception thrown while converting through `materialize()` (the last bullet) is different: it is thrown by a real
-`BasicJsonType` value, so it **does** carry a `JSON_DIAGNOSTICS` path if `BasicJsonType` was built with it enabled.
-That path is relative to the root of the view's subtree, because `materialize()` builds only the subtree (with parent
-pointers): it is empty if the failing value is the subtree's root itself, and it never is the path within the whole
-document.
+The exceptions thrown directly by this function or by a `from_json()` that reads the view (the first four bullets
+above) carry the context of those of `BasicJsonType`: with [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) the
+JSON Pointer path of the value within the document, and with
+[`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md) its bytes in the source text. An exception
+thrown while converting through `materialize()` (the last bullet) is thrown by the materialized `BasicJsonType` value
+instead: its path is relative to the root of the view's subtree, because `materialize()` builds only the subtree
+(with parent pointers), so it is empty if the failing value is the subtree's root itself.

 ## Complexity

@@ -22,9 +22,9 @@ Strong guarantee: there are no changes to the view or the document it refers to.
 Throws [`type_error.302`](../../home/exceptions.md#jsonexceptiontype_error302) if the value is not a string; example:
 `"type must be string, but is array"`.

-This exception does not carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
-`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
-`JSON_DIAGNOSTICS` enabled.
+As for `BasicJsonType`, with [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) the exception names the JSON Pointer
+path of the value within the document, and with [`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md)
+its bytes in the source text (when [`materialize()`](materialize.md) sets them).

 ## Complexity

@@ -22,9 +22,9 @@ Strong guarantee: there are no changes to the view or the document it refers to.
 Throws [`type_error.302`](../../home/exceptions.md#jsonexceptiontype_error302) if the value is not a number; example:
 `"type must be number, but is string"`.

-This exception does not carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
-`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
-`JSON_DIAGNOSTICS` enabled.
+As for `BasicJsonType`, with [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) the exception names the JSON Pointer
+path of the value within the document, and with [`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md)
+its bytes in the source text (when [`materialize()`](materialize.md) sets them).

 ## Complexity

@@ -73,9 +73,10 @@ Strong guarantee: there are no changes to the view or the document it refers to.
    - [`parse_error.109`](../../home/exceptions.md#jsonexceptionparse_error109) if an array index in `ptr` is not a
      number.

-None of these exceptions carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
-`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
-`JSON_DIAGNOSTICS` enabled.
+As for `BasicJsonType`, with [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) these exceptions name the JSON
+Pointer path of the value within the document, and with
+[`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md) its bytes in the source text (when
+[`materialize()`](materialize.md) sets them).

 ## Complexity

@@ -61,9 +61,10 @@ Strong guarantee: there are no changes to the view or the document it refers to.
   `default_value` instead of throwing, exactly as [`BasicJsonType::value`](../basic_json/value.md) catches
   `out_of_range` and returns `default_value`.

-None of these exceptions carry a [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) path: the view has no
-`BasicJsonType` value to point at, so the exception is created without one, even if `BasicJsonType` was built with
-`JSON_DIAGNOSTICS` enabled.
+As for `BasicJsonType`, with [`JSON_DIAGNOSTICS`](../macros/json_diagnostics.md) these exceptions name the JSON
+Pointer path of the value within the document, and with
+[`JSON_DIAGNOSTIC_POSITIONS`](../macros/json_diagnostic_positions.md) its bytes in the source text (when
+[`materialize()`](materialize.md) sets them).

 ## Complexity

@@ -35,6 +35,9 @@ Note that enabling this macro increases the size of every JSON value by two `std
 overhead to parsing, copying JSON value objects, and the generation of error messages for exceptions. It also causes
 these values to be reported in those error messages.

+If [`JSON_DIAGNOSTICS`](json_diagnostics.md) is also set, the message contains the path and the byte range, such as
+`(/1) (bytes 4-8)`. An exception about the root value has no path and only the range, such as `(bytes 0-4)`.
+
 ## Default definition

 The default value is `0` (position diagnostics are switched off).
@@ -5,7 +5,9 @@
 ```

 When defined to `1`, parsing from a `#!cpp FILE*` reads every character with `std::fgetc`, as in version 3.12.0 and
-earlier, instead of locking the file once and reading it with the unlocked stdio functions.
+earlier, instead of locking the file once and reading it with the unlocked stdio functions. This also turns off the
+scan of the `FILE`'s buffer in bulk (see below), which [`JSON_DISABLE_STREAM_BULK_SCAN`](json_disable_stream_bulk_scan.md)
+does not affect.

 It does not change any result: values, exceptions, and the position of the file after parsing are the same either way.
 Only the speed and the locking of the file differ (see the notes on locking below).
@@ -37,9 +39,17 @@ The default value is `0`: the file is locked once and read with the unlocked std
    | Microsoft (MSVC, clang-cl)                                 | `_lock_file`, `_fgetc_nolock`, `_unlock_file`       |
    | others (e.g., musl, MinGW, newlib)                         | `std::fgetc`, as before                             |

-    This makes parsing from a `FILE*` 3 to 4 times as fast with the Apple C library and 1.1 to 1.3 times as fast with
-    glibc, whose locking is cheaper. The binary formats ([`from_cbor`](../basic_json/from_cbor.md),
-    [`from_msgpack`](../basic_json/from_msgpack.md), ...) read from a `FILE*` the same way.
+    With glibc and the Apple C library, the parser also scans the characters that the `FILE` already holds in its
+    buffer in bulk, as it scans the get area of a stream (see
+    [`JSON_DISABLE_STREAM_BULK_SCAN`](json_disable_stream_bulk_scan.md)): it reads the same fields of the `FILE` that
+    the C library's own `getc_unlocked` reads, and it consumes exactly the characters that `getc_unlocked` would have
+    returned, so the file is left where it was left before.
+
+    Locking the file once makes parsing from a `FILE*` 3 to 4 times as fast with the Apple C library and 1.1 to 1.3
+    times as fast with glibc, whose locking is cheaper. Scanning the buffer in bulk makes `parse()` another 1.7 to 2.6
+    times as fast (and `accept()` 2.9 to 4.4 times), about as fast as parsing from a `std::ifstream`. The binary
+    formats ([`from_cbor`](../basic_json/from_cbor.md), [`from_msgpack`](../basic_json/from_msgpack.md), ...) read
+    from a `FILE*` the same way.

 !!! note "Locking"

@@ -759,9 +759,14 @@ body:has(.nj-hero) .md-content {
    }
 }

+/* blog posts: author and date right below the title */
+.md-typeset .nj-byline { margin: -.8rem 0 1.6rem; font-size: .75rem; color: var(--md-default-fg-color--light); }
+.md-typeset .nj-byline a { color: inherit; }
+.md-typeset .nj-byline a:hover { color: var(--md-accent-fg-color); }
+
 /* figure captions: "Figure N." in bold, close to the figure, set in from the text column; figures and tables are
   numbered per page, each with its own counter */
-.md-content__inner { counter-reset: nj-figure nj-table; }
+.md-content__inner { counter-reset: nj-figure nj-table nj-listing; }
 .md-typeset :is(.nj-caption, .nj-charts-caption) {
    max-width: none;
    margin: .3rem 2rem 1.5rem;
@@ -782,6 +787,25 @@ body:has(.nj-hero) .md-content {
    .md-typeset :is(.nj-caption, .nj-charts-caption) { margin-inline: 1rem; }
 }

+/* code captions: "Listing N." in bold, directly below the code block, in the figure caption style */
+.md-typeset .nj-code-caption {
+    max-width: none;
+    margin: -.4rem 2rem 1.5rem;
+    font-size: .75rem;
+    line-height: 1.5;
+    text-align: left;
+    color: var(--md-default-fg-color--light);
+}
+.md-typeset .nj-code-caption::before {
+    counter-increment: nj-listing;
+    content: "Listing " counter(nj-listing) ". ";
+    font-weight: 700;
+    color: var(--md-default-fg-color);
+}
+@media screen and (max-width: 44.9375em) {
+    .md-typeset .nj-code-caption { margin-inline: 1rem; }
+}
+
 /* table captions: "Table N." in bold, directly below the table, in the figure caption style */
 .md-typeset .nj-table-caption {
    max-width: none;
@@ -27,6 +27,10 @@

 .md-typeset svg.nj-charts--compile, .md-typeset svg.nj-charts--scaling { max-width: 26rem; }
 .md-typeset svg.nj-charts--sizes { max-width: 26rem; }
+/* home/blog/how_3_13_0_got_faster.md (scripts/figures/perf_blog.py) */
+.md-typeset svg.nj-charts--blog { max-width: 34rem; }
+.md-typeset svg.nj-charts--swar { max-width: 34rem; }
+.md-typeset svg.nj-charts--timeline { max-width: 22rem; }

 .nj-charts text { fill: currentColor; font-size: 13px; }
 .nj-charts .nj-charts-leg { font-size: 13.5px; }
@@ -43,10 +47,34 @@
    paint-order: stroke; stroke: var(--md-default-bg-color); stroke-width: 4px; stroke-linejoin: round; }
 .nj-charts .nj-charts-factor { fill: var(--nj-charts-ink2); font-size: 12px; font-weight: 600; text-anchor: middle; }
 .nj-charts .nj-charts-note { fill: var(--nj-charts-ink2); font-size: 12px; }
+/* heatmap cells (perf_blog_usecases_*.svg): green for the fastest, gray around twice the time, red for the slowest;
+   adjacent steps checked for CVD separation on the light and the slate surface; the numbers are in every cell */
+.md-typeset svg.nj-charts--heat { max-width: 49rem; }
+.nj-charts--heat { --nj-heat-0: #3fa557; --nj-heat-1: #8bcc95; --nj-heat-2: #ebeae6; --nj-heat-3: #f2ae9b;
+                   --nj-heat-4: #dc5a43; --nj-heat-ink: #1b1b1b; --nj-heat-ink-strong: #1b1b1b; }
+[data-md-color-scheme="slate"] .nj-charts--heat { --nj-heat-0: #3a9d50; --nj-heat-1: #2c6b3a; --nj-heat-2: #33353a;
+                   --nj-heat-3: #8a3f2e; --nj-heat-4: #d95b3a; --nj-heat-ink: #e8e8e6; --nj-heat-ink-strong: #141414; }
+.nj-charts .nj-heat-0 { fill: var(--nj-heat-0); }
+.nj-charts .nj-heat-1 { fill: var(--nj-heat-1); }
+.nj-charts .nj-heat-2 { fill: var(--nj-heat-2); }
+.nj-charts .nj-heat-3 { fill: var(--nj-heat-3); }
+.nj-charts .nj-heat-4 { fill: var(--nj-heat-4); }
+.nj-charts .nj-heat-na { fill: none; stroke: var(--nj-charts-grid); stroke-width: 1; }
+.nj-charts .nj-charts-cell { fill: var(--nj-heat-ink); font-size: 12px; font-variant-numeric: tabular-nums; }
+.nj-charts :is(.nj-heat-0, .nj-heat-4) ~ .nj-charts-cell { fill: var(--nj-heat-ink-strong); }
+.nj-charts .nj-charts-cell--small { font-size: 10.5px; }
+.nj-charts .nj-heat-cell { cursor: default; outline: none; }
+.nj-charts .nj-heat-cell:is(:hover, :focus-visible, .nj-heat-on) rect { stroke: var(--md-default-fg-color); stroke-width: 1.5; }
+.nj-heat-tip { position: absolute; z-index: 5; max-width: 24rem; padding: .5rem .7rem; border-radius: 6px;
+               background: var(--md-default-bg-color); color: var(--md-default-fg-color);
+               box-shadow: 0 2px 10px rgba(0, 0, 0, .25); font-size: .68rem; line-height: 1.45; pointer-events: none; }
+.nj-heat-tip strong { display: block; margin-bottom: .2rem; }
+.nj-heat-tip[hidden] { display: none; }

 .nj-charts .nj-charts-grid { stroke: var(--nj-charts-grid); stroke-width: 1; }
 .nj-charts .nj-charts-zero, .nj-charts .nj-charts-axis { stroke: var(--nj-charts-base); stroke-width: 1.5; }
 .nj-charts .nj-charts-ref { stroke: currentColor; stroke-width: 1.5; }
+.nj-charts .nj-charts-head { fill: var(--nj-charts-base); }

 .nj-charts .nj-charts-c1 { fill: var(--nj-charts-c1); }
 .nj-charts .nj-charts-c2 { fill: var(--nj-charts-c2); }
@@ -140,3 +168,19 @@
 /* direct line labels replace the legend */
 .nj-charts .nj-charts-name-json { fill: var(--nj-charts-json-c); font-weight: 600; }
 .nj-charts .nj-charts-name-ojson { fill: var(--nj-charts-ojson-c); font-weight: 600; }
+
+/* theme badges of home/blog/how_3_13_0_got_faster.md: the number of one of the eight themes, as a digit in a blue
+   circle, in headings, text, tables and the timeline figures (nj-theme-dot); "U" and other marks are gray */
+.md-typeset .nj-theme { display: inline-flex; align-items: center; justify-content: center; box-sizing: border-box;
+    min-width: 1.45em; height: 1.45em; padding: 0 .3em; border-radius: .725em; vertical-align: .08em;
+    background: var(--nj-blue); color: var(--md-default-bg-color); font-size: .78em; font-weight: 700; line-height: 1;
+    font-variant-numeric: tabular-nums; text-decoration: none; }
+.md-typeset a.nj-theme:is(:hover, :focus-visible) { background: var(--nj-blue-deep); color: var(--md-default-bg-color); }
+.md-typeset .nj-theme--other { background: var(--md-default-fg-color--light); }
+.md-typeset h2 .nj-theme { margin-right: .35em; vertical-align: .12em; }
+.md-typeset .nj-theme-list > ul { list-style: none; margin-left: 0; }
+.md-typeset .nj-theme-list > ul > li { margin-left: 0; padding-left: 2em; text-indent: -2em; }
+.md-typeset .nj-theme-list > ul > li > .nj-theme { margin-right: .55em; text-indent: 0; }
+.nj-charts .nj-theme-dot { fill: var(--nj-blue); }
+.nj-charts .nj-theme-dot--other { fill: var(--nj-charts-ink2); }
+.nj-charts .nj-theme-num { fill: var(--md-default-bg-color); font-size: 11px; font-weight: 700; }
@@ -0,0 +1,130 @@
+# Reading and writing files
+
+The library has no functions that take a file name. It reads from and writes to streams, so files are handled with
+`#!cpp std::ifstream` and `#!cpp std::ofstream` (or a `#!cpp FILE*` when reading). This page collects the recipes for
+the common cases and the mistakes that show up again and again.
+
+## Reading a JSON file
+
+Pass the stream to [`parse`](../api/basic_json/parse.md) directly, and check that the file was opened:
+
+```cpp
+#include <fstream>
+#include <stdexcept>
+#include <string>
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::json;
+
+json read_json_file(const std::string& path)
+{
+    std::ifstream f(path);
+    if (!f.is_open())
+    {
+        throw std::runtime_error("cannot open " + path);
+    }
+    return json::parse(f);
+}
+```
+
+- **Check that the file is open.** A stream that failed to open looks like an empty input, so `parse` reports
+  [`parse_error.101`](../home/exceptions.md#jsonexceptionparse_error101) ("unexpected end of input") at line 1,
+  column 1 instead of saying that the file is missing. A relative path is resolved against the working directory of the
+  running program, which is often not the directory of the source file (see the
+  [FAQ](../home/faq.md#parsing-a-file-fails-with-unexpected-end-of-input)).
+- **Don't read the file into a string first.** Parsing from a `#!cpp std::ifstream` is only about 10 to 20 % slower
+  than reading the whole file into a string with one `read()` and parsing that, and it needs no memory for the copy (see
+  [input sources and performance](parsing/index.md#input-sources-and-performance)). The common way to read a file with
+  `#!cpp std::istreambuf_iterator<char>` is so slow that it takes about twice as long as parsing from the stream. Read
+  the file into a string only if you need the text itself, for example for an error message. This advice is for
+  `#!cpp json::parse`. [`json_document`](json_view.md) reads a stream into a buffer that it owns anyway, so there is no
+  copy to save: reading the file into a `#!cpp std::string` yourself and passing that as an lvalue, which the document
+  borrows, was about 6 to 12 % faster than parsing from the stream, with the same single buffer.
+- `parse` requires the file to hold exactly one JSON value. Files with one value per line are read with
+  [JSON Lines](parsing/json_lines.md); files too large for memory are covered in
+  [Large, streamed, and partial input](parsing/large_and_partial_input.md).
+
+## Writing a JSON file
+
+[`dump`](../api/basic_json/dump.md) the value into a string first, then write the string:
+
+```cpp
+void write_json_file(const std::string& path, const json& j)
+{
+    const std::string text = j.dump(4) + '\n';  // may throw: nothing is written yet
+
+    std::ofstream f(path, std::ios::binary);
+    if (!f.is_open())
+    {
+        throw std::runtime_error("cannot open " + path);
+    }
+    f << text;
+    f.close();
+    if (f.fail())
+    {
+        throw std::runtime_error("cannot write " + path);
+    }
+}
+```
+
+- **Serialize before opening the file.** Opening a `#!cpp std::ofstream` truncates the file. `dump` and
+  [`operator<<`](../api/operator_ltlt.md) throw [`type_error.316`](../home/exceptions.md#jsonexceptiontype_error316)
+  when a string is not valid UTF-8 (see [handling invalid UTF-8](serialization.md#handling-invalid-utf-8)), and
+  `#!cpp f << std::setw(4) << j` may already have written part of the value when it throws. Serializing into a string
+  first leaves the old file untouched in that case.
+- **Check the stream after closing it.** A full disk or a missing permission sets the stream's error state; it does not
+  throw unless you enabled exceptions on the stream with `exceptions()`.
+- `std::ios::binary` writes the text as it is. Without it, Windows writes `\r\n` for every newline of a pretty-printed
+  value.
+
+## Replacing a file without corrupting it
+
+The library never writes a file itself, so this section is not about the library. It is general C++ advice for a
+problem users of the library keep running into.
+
+A program that crashes or is killed while it writes leaves a truncated file behind. To make sure readers see either the
+old or the new contents, write to a temporary file in the same directory and rename it over the original
+(C++17, `#!cpp <filesystem>`):
+
+```cpp
+#include <filesystem>
+
+void replace_json_file(const std::filesystem::path& path, const json& j)
+{
+    std::filesystem::path tmp = path;
+    tmp += ".tmp";  // use a unique name if several processes may write the file
+
+    write_json_file(tmp.string(), j);
+    std::filesystem::rename(tmp, path);  // replaces path
+}
+```
+
+The temporary file must be in the same directory (more precisely, on the same file system) as the target: a rename
+across file systems does not fall back to a copy, it fails and throws `#!cpp std::filesystem::filesystem_error`. On
+POSIX systems, the rename atomically replaces the file. Standard C++ has no way to flush a file to the disk (`fsync`),
+so this protects against a crashed program, but not necessarily against a power loss.
+
+## Binary formats
+
+The [binary formats](binary_formats/index.md) work the same way, with the streams opened in binary mode:
+
+```cpp
+// read
+std::ifstream in("data.cbor", std::ios::binary);
+json j = json::from_cbor(in);
+
+// write
+const std::vector<std::uint8_t> bytes = json::to_cbor(j);
+std::ofstream out("data.cbor", std::ios::binary);
+out.write(reinterpret_cast<const char*>(bytes.data()), static_cast<std::streamsize>(bytes.size()));
+```
+
+Without `std::ios::binary`, Windows turns the bytes `0x0D 0x0A` into `0x0A` and may stop at a byte `0x1A` while reading,
+and turns `0x0A` into `0x0D 0x0A` while writing, which corrupts the data.
+
+## See also
+
+- [Parsing](parsing/index.md) - the inputs `parse` accepts
+- [Serialization](serialization.md) - the options of `dump`
+- [`parse`](../api/basic_json/parse.md), [`dump`](../api/basic_json/dump.md)
+- [`operator>>`](../api/operator_gtgt.md), [`operator<<`](../api/operator_ltlt.md)
@@ -46,6 +46,8 @@ C++ types, and finally serialize it again.
  [BJData](binary_formats/bjdata.md), [BON8](binary_formats/bon8.md), [BSON](binary_formats/bson.md),
  [CBOR](binary_formats/cbor.md), [MessagePack](binary_formats/messagepack.md), or [UBJSON](binary_formats/ubjson.md).
 - [Binary values](binary_values.md) — store and exchange raw byte sequences.
+- [Reading and writing files](files.md) — read and write files safely, including replacing a file without
+  corrupting it.

 ## How values are stored and configured

@@ -29,7 +29,8 @@ other three continue on its result.

    [`patch`](../api/basic_json/patch.md) leaves the original value unchanged and returns the patched result as a copy.
    If the document is large and the original value is no longer needed,
-    [`patch_inplace`](../api/basic_json/patch_inplace.md) applies the same operations in place instead.
+    [`patch_inplace`](../api/basic_json/patch_inplace.md) applies the same operations in place instead. Unlike
+    `patch`, it is not atomic: if an operation fails, the operations before it stay applied.

 !!! note "Duplicate member names"

@@ -134,9 +134,21 @@ document: `#!cpp auto v = json_document::parse(text).root();` does not compile.
 - **Macros.** [`JSON_STRICT_NUL_HANDLING`](../api/macros/json_strict_nul_handling.md) and
  [`JSON_NOEXCEPTION`](../api/macros/json_noexception.md)/[`JSON_THROW_USER`](../api/macros/json_throw_user.md)
  behave the same way they do for `<nlohmann/json.hpp>`. These are the macros that change what the parser accepts or
-  how it reports errors. The others either do not apply ([`JSON_DIAGNOSTICS`](../api/macros/json_diagnostics.md)
-  needs parent pointers in `basic_json` values) or only affect the values `materialize()` produces, through
-  `BasicJsonType`.
+  how it reports errors. Two more macros add context to the exceptions of views, as they do for those of
+  `#!cpp basic_json`:
+
+    - With [`JSON_DIAGNOSTICS`](../api/macros/json_diagnostics.md), an exception names the JSON Pointer path of the
+      value within the document.
+    - With [`JSON_DIAGNOSTIC_POSITIONS`](../api/macros/json_diagnostic_positions.md), an exception names the bytes of
+      the value in the source text.
+
+    A view has neither parent pointers nor stored positions, so both are found from the document's index when the
+    exception is thrown. This takes time linear in the size of the document. One exception has neither:
+    `key()` of an iterator over an array or a primitive value
+    ([`invalid_iterator.207`](../home/exceptions.md#jsonexceptioninvalid_iterator207)), because a view's iterator does
+    not know the value it iterates over.
+
+    The other macros only affect the values `materialize()` produces, through `BasicJsonType`.

 ## What is different

@@ -148,7 +160,9 @@ document: `#!cpp auto v = json_document::parse(text).root();` does not compile.
  wide. The limit is 16 bytes below 2^32, because the parser reads in 16-byte steps, and a position one step past the
  end must still fit.
 - **A stream is always read to its end.** There is no partial/streaming read of an `#!cpp std::istream`: the stream
-  is read to its end into a buffer the document owns, and parsing starts after that.
+  is read to its end into a buffer the document owns, and parsing starts after that. For a file, reading it into a
+  `#!cpp std::string` yourself and parsing that (an lvalue is borrowed) is therefore not more expensive in memory, and
+  was about 6 to 12 % faster than parsing from an `#!cpp std::ifstream`.
 - **Fewer source positions after edits.** With
  [`JSON_DIAGNOSTIC_POSITIONS`](../api/macros/json_diagnostic_positions.md) enabled,
  [`materialize()`](../api/basic_json_view/materialize.md) sets the same positions as `#!cpp basic_json::parse()`.
@@ -167,10 +181,6 @@ document: `#!cpp auto v = json_document::parse(text).root();` does not compile.
  [`at`](../api/basic_json_view/at.md) throws for every missing value.
 - **Duplicate keys: lookups find the first member, `parse()` keeps the last.** See [Duplicate keys](#duplicate-keys)
  below.
- **No [`JSON_DIAGNOSTICS`](../api/macros/json_diagnostics.md) path.** Exceptions thrown by `basic_json_view`'s own
-  element access and lookup functions never carry the JSON Pointer path `JSON_DIAGNOSTICS` would otherwise add: the
-  view has no `basic_json` value to point at, so the exception is created without one, regardless of how
-  `BasicJsonType` was built.
 - **Ordering comparisons are not provided** by `basic_json_view` — there is no `#!cpp operator<`.
  [`operator==`](../api/basic_json_view/operator_eq.md) and [`operator!=`](../api/basic_json_view/operator_ne.md) are
  provided, though: two views, or a view and a `BasicJsonType` value, compare equal exactly when
@@ -253,6 +263,34 @@ Two conversions never copy at all:

 Both results are only valid as long as the view — and, for a string with no escapes, the borrowed source text — is.

+### `string_view` members
+
+A struct whose member is a `#!cpp std::string_view` (C++17) can be decoded from a view with the
+`NLOHMANN_DEFINE_TYPE_*` macros, and the member is not copied either: for a string without escape sequences it points
+into the document's source text, and for a string with escape sequences into the document's buffer of decoded strings.
+The member is valid as long as the document is alive and, for a document that
+[borrows its source text](#ownership-and-lifetime) (as [`parse()`](../api/basic_json_document/parse.md) does for
+an lvalue `#!cpp std::string`, a `#!cpp std::string_view`, or a C string), as long as that text is.
+
+```cpp
+struct record
+{
+    std::string_view name;
+    int count;
+    NLOHMANN_DEFINE_TYPE_INTRUSIVE(record, name, count)
+};
+
+const std::string text = R"({"name": "widget", "count": 3})";
+const json_document doc = json_document::parse(text);  // borrows text
+const record r = doc.root().get<record>();             // r.name points into text, valid while text and doc are
+```
+
+!!! warning "Decoding into a `string_view` from a `json` value dangles at once"
+
+    The same struct also compiles with `#!cpp json::parse(text).get<record>()`, but there `name` points into the
+    temporary `json` value, which is destroyed at the end of the statement. Use a named
+    [`json_document`](../api/json_document.md), as above, to decode such a struct.
+
 ## Writing generic code

 A view's type names its `BasicJsonType` and its [`view_mode`](../api/view_mode.md):
@@ -329,14 +367,10 @@ Its body may only use what views and `basic_json` have in common: the type check
 a view does not have; such a type is converted through `materialize()`. A `from_json()` for `json` only is
 converted through `materialize()` as well.

-Two things differ when a `from_json()` reads the view:
-
- **Duplicate keys.** Members looked up by name (`at()`, `value()`, ... and thus the macros) find the **first** member
-  with a repeated key, see [Duplicate keys](#duplicate-keys); `#!cpp materialize().get<T>()` would see the last one.
-  Containers built from an object, such as `#!cpp std::map`, keep the **last** value either way, as
-  [`parse()`](../api/basic_json/parse.md) does.
- **[`JSON_DIAGNOSTICS`](../api/macros/json_diagnostics.md).** Exceptions thrown by the view carry no path to the
-  value.
+One thing differs when a `from_json()` reads the view: members looked up by name (`at()`, `value()`, ... and thus
+the macros) find the **first** member with a repeated key, see [Duplicate keys](#duplicate-keys);
+`#!cpp materialize().get<T>()` would see the last one. Containers built from an object, such as `#!cpp std::map`,
+keep the **last** value either way, as [`parse()`](../api/basic_json/parse.md) does.

 `to_json()` is unaffected: it writes `basic_json` values, never views.

@@ -35,6 +35,8 @@ std::ifstream f("example.json");
 json data = json::parse(f);
 ```

+See [Reading and writing files](../files.md) for checking that the file was opened and for writing files safely.
+
 The input must be encoded in UTF-8; other encodings are not supported. The exception is wide-character input, which
 is read as UTF-16 or UTF-32 — depending on the character type — and converted to UTF-8; see the
 [`parse`](../../api/basic_json/parse.md) page for an example. A single input may contain only one JSON value.
@@ -75,7 +77,7 @@ them faster than others:
 |--------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------|
 | strings, string views, string literals, contiguous containers, pointer or iterator ranges over contiguous memory | the whole input is scanned in bulk: runs of string characters, numbers, and indentation are recognized several bytes at a time |
 | `#!cpp std::istream` (`#!cpp std::ifstream`, `#!cpp std::istringstream`, ...)            | the characters the stream buffer holds are scanned in bulk like a string; the stream buffer is asked for more when they are used up |
-| `#!cpp FILE*`                                                                              | one character at a time, with the file locked once for the whole parse              |
+| `#!cpp FILE*`                                                                              | with glibc and the Apple C library, the characters the `FILE` holds in its buffer are scanned in bulk like a stream's; elsewhere one character at a time; the file is locked once for the whole parse |
 | other iterator ranges (e.g., `#!cpp std::list<char>`, `#!cpp std::istreambuf_iterator<char>`), wide strings | one character at a time                                                             |

 Parsing a file from a `#!cpp std::ifstream` is therefore only about 10 to 20 % slower than reading the whole file into a
@@ -84,6 +86,9 @@ ahead: after parsing, it is positioned exactly as if every character had been re
 [`operator>>`](../../api/operator_gtgt.md) can still read several values from one stream (see also
 [JSON Lines](json_lines.md)).

+This does not hold for [`json_document`](../json_view.md): it reads a stream into a buffer it owns, so the stream saves
+no memory, and reading the file into a `#!cpp std::string` yourself and borrowing it is about 6 to 12 % faster.
+
 Two macros switch these optimizations off without changing any result:
 [`JSON_DISABLE_STREAM_BULK_SCAN`](../../api/macros/json_disable_stream_bulk_scan.md) for stream buffers that do not
 follow the usual `std::streambuf` contract, and
@@ -27,8 +27,8 @@ A `#!cpp std::istream` (including `#!cpp std::ifstream`) gets the same bulk scan
 characters its stream buffer already holds (the *get area*) and asks the stream buffer for more only when they are used
 up. Nothing is read ahead, so the stream is left exactly where it would be after reading one character at a time, and
 [`operator>>`](../api/operator_gtgt.md) can still read several values from one stream. A stream buffer without a get
-area is read one character at a time. A `#!cpp FILE*` is still read one character at a time, but `file_input_adapter`
-locks the file once per parse instead of once per character. See
+area is read one character at a time. A `#!cpp FILE*` is locked once per parse instead of once per character, and with
+glibc and the Apple C library, the characters in its buffer are scanned in bulk as a stream's get area is. See
 [input sources and performance](parsing/index.md#input-sources-and-performance) for the full table. According to the
 description of [#5828](https://github.com/nlohmann/json/pull/5828), parsing from a stream is within about 10 to 20 % of
 parsing an equivalent `#!cpp std::string`.
@@ -39,7 +39,9 @@ iterator pair over non-contiguous but random-access storage (e.g. `#!cpp std::de
 optimization but not the second, since the byte-scanning fast path requires contiguous storage.

 Practically: a file can be passed directly to `parse`, which also avoids the memory for a copy of the file. Reading it
-into a string first is no longer necessary for speed:
+into a string first is no longer necessary for speed (this is for `#!cpp json::parse`; a
+[`json_document`](json_view.md) reads a stream into an owned buffer anyway, so for it reading the file into a string
+and borrowing that is the faster way):

 ```cpp
 // fast: the stream buffer's get area is scanned in bulk
@@ -17,6 +17,9 @@ To write a value directly to a stream (for example, a file or `#!cpp std::cout`)
 std::cout << j << std::endl;
 ```

+To write a file without leaving a truncated file behind when serialization fails, see
+[Reading and writing files](files.md#writing-a-json-file).
+
 !!! note "String, not raw value"

    `dump` always returns a **JSON text**. Serializing a JSON string therefore includes the surrounding quotes and
@@ -406,6 +406,7 @@ using array_t = ArrayType<basic_json, AllocatorType<basic_json>>;
 | `#!cpp operator<<(std::ostream&, const json_pointer&)`                                                                            | streamability to `#!cpp std::ostream`                                                                                                                                                        |
 | [`to_string`](../../api/basic_json/to_string.md)                                                                                  | conversion of `StringType` to `#!cpp std::string` (the function returns a `#!cpp std::string`)                                                                                               |
 | exception messages                                                                                                                | `data()` and `size()`, or `begin()` and `end()`                                                                                                                                              |
+| [`basic_json_view::dump`](../../api/basic_json_view/dump.md)                                                                      | `reserve(n)` and `resize(n)` (one argument); `capacity()` is **not** required                                                                                                                |

 ### Compatible types

@@ -10,6 +10,13 @@ at its root, a [Natvis](https://learn.microsoft.com/en-us/visualstudio/debugger/
 file that gives `json`/`ordered_json` values a friendly, key/value debugger view instead of showing raw internal
 fields, when debugging with the MSVC debug engine (`cppvsdbg`) in Visual Studio or VS Code.

+The file also has visualizers for `json_document` and `json_view` (and their `ordered_json`/editable variants). They
+show the value of the document or view, and its elements as an expandable list. Because a document is only a flat index
+into the source text, the strings of the direct elements are shown, but the elements of nested arrays and objects are
+shown as index nodes (their kind, size, and numbers; strings only by length). Arrays and objects that have been edited
+in a `json_editable_document` are not expanded. The visualizers read the internal layout of the MSVC STL (`std::array`,
+`std::unique_ptr`).
+
 The checked-in visualizers cover namespace variants with zero, one, or two ABI tags. Configurations with three or more
 ABI tags are not covered and may show raw internal fields instead. To generate a Natvis file for such a configuration:

@@ -29,7 +36,7 @@ ABI tags are not covered and may show raw internal fields instead. To generate a

 4. Use the generated file instead of `nlohmann_json.natvis`.

-`--abi-tags` can be repeated for several configurations, and `--all` generates every combination (about 60 MB for 12
+`--abi-tags` can be repeated for several configurations, and `--all` generates every combination (about 60 MB for 11
 ABI tags, doubling with each further tag). See
 [`tools/generate_natvis`](https://github.com/nlohmann/json/tree/develop/tools/generate_natvis) for all options.

@@ -110,7 +110,7 @@ in the source files that need it, instantiate `basic_json` once, and consider pr
 The parser did not see any character: the file was most likely not opened. A relative path is resolved against the
 working directory of the running program, which is often the build directory of your IDE, not the source directory.
 Check `is_open()` and try an absolute path. Other causes are an empty file and a stream that was already read. See
-[`parse_error.101`](exceptions.md#jsonexceptionparse_error101).
+[`parse_error.101`](exceptions.md#jsonexceptionparse_error101) and [Reading and writing files](../features/files.md).

 ### Input that arrives in chunks

@@ -1,21 +1,21 @@
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 <title id="nj-charts-ct">Change in compile time against the default configuration at -O0, Apple clang and G&#8203;CC 16</title>
-<desc id="nj-charts-ct-d">Grouped horizontal bars, negative is faster. json_fwd.hpp instead of json.hpp on a header-only translation unit: Apple clang -62 %, G&#8203;CC 16 -82 %; extern template on a parsing translation unit: Apple clang -7 %, G&#8203;CC 16 -21 %; JSON_NO_AUTOMATIC_UDLS on a model translation unit: Apple clang -11 %, G&#8203;CC 16 -11 %; JSON_NO_AUTOMATIC_UDLS on a parsing translation unit: Apple clang -1 %, G&#8203;CC 16 -2 %; JSON_HAS_FILESYSTEM=0 + JSON_NO_IO on a model translation unit: Apple clang -8 %, G&#8203;CC 16 -11 %; JSON_HAS_FILESYSTEM=0 on a model translation unit: Apple clang -5 %, G&#8203;CC 16 -9 %; JSON_NO_IO on a model translation unit: Apple clang -2 %, G&#8203;CC 16 -2 %; JSON_USE_GLOBAL_UDLS=0 on a model translation unit: Apple clang 0 %, G&#8203;CC 16 -1 %.</desc>
+<desc id="nj-charts-ct-d">Grouped horizontal bars, negative is faster. json_fwd.hpp instead of json.hpp on a header-only translation unit: Apple clang -62 %, G&#8203;CC 16 -82 %; extern template on a parsing translation unit: Apple clang -7 %, G&#8203;CC 16 -21 %; JSON_NO_AUTOMATIC_UDLS on a model translation unit: Apple clang -11 %, G&#8203;CC 16 -11 %; JSON_NO_AUTOMATIC_UDLS on a parsing translation unit: Apple clang -1 %, G&#8203;CC 16 -2 %; JSON_HAS_FILESYSTEM=0 + JSON_NO_IO on a model translation unit: Apple clang -8 %, G&#8203;CC 16 -11 %; JSON_HAS_FILESYSTEM=0 on a model translation unit: Apple clang -5 %, G&#8203;CC 16 -9 %; JSON_HAS_STD_FORMAT=0 on a model translation unit: Apple clang -1 %, G&#8203;CC 16 -4 %; JSON_HAS_RANGES=0 on a model translation unit: Apple clang -4 %, G&#8203;CC 16 -1 %; JSON_NO_IO on a model translation unit: Apple clang -2 %, G&#8203;CC 16 -2 %; JSON_USE_GLOBAL_UDLS=0 on a model translation unit: Apple clang 0 %, G&#8203;CC 16 -1 %.</desc>
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-<text class="nj-charts-tick" x="126.2" y="488">&#8722;60 %</text>
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+<line class="nj-charts-grid" x1="126.2" y1="58" x2="126.2" y2="576"/>
+<text class="nj-charts-tick" x="126.2" y="592">&#8722;60 %</text>
+<line class="nj-charts-grid" x1="205" y1="58" x2="205" y2="576"/>
+<text class="nj-charts-tick" x="205" y="592">&#8722;40 %</text>
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+<text class="nj-charts-tick" x="283.8" y="592">&#8722;20 %</text>
+<text class="nj-charts-tick" x="362.6" y="592">0 %</text>
+<text class="nj-charts-tick nj-charts-tick--l" x="8" y="610">&#8592; faster</text>
+<text class="nj-charts-tick nj-charts-tick--r" x="462" y="610">slower &#8594;</text>
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@@ -17,16 +17,16 @@
 <path class="nj-jsonview-arr nj-jsonview-c-line" d="M76 115 L106 115" marker-end="url(#jvl-line)"/>
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 <text class="nj-jsonview-mono" x="150" y="120" text-anchor="middle" xml:space="preserve">std::map</text>
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 <text class="nj-jsonview-mono nj-jsonview-c-num" x="396" y="120" text-anchor="end" xml:space="preserve">19.9</text>
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 <text class="nj-jsonview-mono nj-jsonview-c-line" x="396" y="168" text-anchor="end" xml:space="preserve">•</text>
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@@ -0,0 +1,148 @@
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+<title id="fig-jvlt-title">A J&#8203;SON text parsed by basic_json::parse()</title>
+<desc id="fig-jvlt-title-d">The text {&quot;port&quot;: 6379, &quot;price&quot;: 19.90, &quot;tags&quot;: [&quot;eu&quot;, &quot;a\&quot;b&quot;]} parsed by basic_json::parse(): the root json value points to a std::map whose three nodes are separate heap allocations; the price is stored as the double 19.9; the tags array is a std::vector of two json values, each pointing to its own std::string.</desc>
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+<title id="nj-blog-overview">Speedup of 3.13.0 over 3.12.0 per workload, Apple M1 Max, Apple clang</title>
+<desc id="nj-blog-overview-d">Horizontal bars of the speedup, more is better. twitter.json 3.5x; citm_catalog.json 5.1x; canada.json 4.1x; canada.json, indented 7.4x; citm, ordered_json 8.2x; twitter, std::ifstream 2.5x; citm, FILE* 15x; citm, accept() 14x; dump() twitter 6.6x; dump() canada 2.9x; dump(4) citm 4.6x; to_cbor() twitter 4.4x; twitter, memory 3.5x; twitter, FILE* 9.2x; diff() canada 10x; iterate canada 1.96x; copy + destroy citm 1.11x; == citm 1.01x.</desc>
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+<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="42" text-anchor="end">twitter.json</text>
+<path class="nj-charts-c1" d="M190 30 H257.981 Q261.981 30 261.981 34 V41 Q261.981 45 257.981 45 H190 Z"><title>twitter.json: 3.5&#215;</title></path>
+<text class="nj-charts-val" x="266.981" y="42">3.5&#215;</text>
+<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="66" text-anchor="end">citm_catalog.json</text>
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+<text class="nj-charts-val" x="300.394" y="66">5.1&#215;</text>
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+<text class="nj-charts-val" x="279.15" y="90">4.1&#215;</text>
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+<text class="nj-charts-val" x="347.831" y="114">7.4&#215;</text>
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+<path class="nj-charts-c1" d="M190 126 H354.712 Q358.712 126 358.712 130 V137 Q358.712 141 354.712 141 H190 Z"><title>citm, ordered_json: 8.2&#215;</title></path>
+<text class="nj-charts-val" x="363.712" y="138">8.2&#215;</text>
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+<path class="nj-charts-c1" d="M190 150 H236.738 Q240.738 150 240.738 154 V161 Q240.738 165 236.738 165 H190 Z"><title>twitter, std::ifstream: 2.5&#215;</title></path>
+<text class="nj-charts-val" x="245.738" y="162">2.5&#215;</text>
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+<text class="nj-charts-val" x="503.137" y="186">15&#215;</text>
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+<text class="nj-charts-val" x="476.738" y="210">14&#215;</text>
+<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="266" text-anchor="end">dump() twitter</text>
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+<text class="nj-charts-val" x="254.812" y="290">2.9&#215;</text>
+<text class="nj-charts-rowlabel nj-charts-tick--r" x="182" y="314" text-anchor="end">dump(4) citm</text>
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+<text class="nj-charts-val" x="290.288" y="314">4.6&#215;</text>
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+<text class="nj-charts-val" x="285.956" y="338">4.4&#215;</text>
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+<text class="nj-charts-val" x="267.6" y="394">3.5&#215;</text>
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+<text class="nj-charts-val" x="385.369" y="418">9.2&#215;</text>
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+<text class="nj-charts-val" x="410.325" y="474">10&#215;</text>
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+<text class="nj-charts-val" x="235.425" y="498">1.96&#215;</text>
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+<title id="nj-blog-price">Compile time of two programs with 3.13.0, alone, with a precompiled header and as a module, compared with 3.12.0</title>
+<desc id="nj-blog-price-d">Horizontal bars of the change in compile time against 3.12.0, less is better. Apple clang 21, -O0 (debug), count_numbers, 3.13.0: +36%; Apple clang 21, -O0 (debug), count_numbers, 3.13.0, precompiled header: -23%; Apple clang 21, -O0 (debug), count_numbers, 3.13.0, module: -5%; Apple clang 21, -O0 (debug), server_config, 3.13.0: +36%; Apple clang 21, -O0 (debug), server_config, 3.13.0, precompiled header: -20%; Apple clang 21, -O0 (debug), server_config, 3.13.0, module: +8%; Apple clang 21, -O2, count_numbers, 3.13.0: +43%; Apple clang 21, -O2, count_numbers, 3.13.0, precompiled header: -1%; Apple clang 21, -O2, count_numbers, 3.13.0, module: +12%; Apple clang 21, -O2, server_config, 3.13.0: +42%; Apple clang 21, -O2, server_config, 3.13.0, precompiled header: +12%; Apple clang 21, -O2, server_config, 3.13.0, module: +22%; G&#8203;CC 16, -O0 (debug), count_numbers, 3.13.0: +68%; G&#8203;CC 16, -O0 (debug), count_numbers, 3.13.0, precompiled header: +12%; G&#8203;CC 16, -O0 (debug), count_numbers, 3.13.0, module: +13%; G&#8203;CC 16, -O0 (debug), server_config, 3.13.0: +50%; G&#8203;CC 16, -O0 (debug), server_config, 3.13.0, precompiled header: +15%; G&#8203;CC 16, -O0 (debug), server_config, 3.13.0, module: +16%; G&#8203;CC 16, -O2, count_numbers, 3.13.0: +60%; G&#8203;CC 16, -O2, count_numbers, 3.13.0, precompiled header: +28%; G&#8203;CC 16, -O2, count_numbers, 3.13.0, module: +27%; G&#8203;CC 16, -O2, server_config, 3.13.0: +52%; G&#8203;CC 16, -O2, server_config, 3.13.0, precompiled header: +29%; G&#8203;CC 16, -O2, server_config, 3.13.0, module: +31%.</desc>
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+<desc id="nj-blog-swar-d">The eight bytes w, i, t, t, e, r, quote and comma are loaded as one word. The test sets the high bit only in byte 6, the quote. Counting trailing zero bits gives 55, divided by eight gives 6: bytes 0 to 5 are copied at once, then the quote ends the string.</desc>
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+<title id="nj-blog-tl-dump_twitter">dump() twitter.json: speedup over 3.12.0 by commit</title>
+<desc id="nj-blog-tl-dump_twitter-d">dump() twitter.json: speedup over 3.12.0 at each of 360 commits, ending at 6.8x. Labeled steps, by theme: 6, 2, 2, 2.</desc>
+<text class="nj-charts-panel" x="8" y="18">dump() twitter.json</text>
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+<title id="nj-blog-uc-x86-clang">Use cases: time of each library relative to the fastest, x86-64 with Clang 23</title>
+<desc id="nj-blog-uc-x86-clang-d">Table of relative times, libraries by use case. nlohmann/json json_document validate: 1.00; nlohmann/json json_document sum: 1.05; nlohmann/json json_document select: 1.00; nlohmann/json json_document edit: 1.00 (0.81 doing less, N); nlohmann/json json_document minify: 1.00 (0.83 doing less, N); nlohmann/json json_document write: 1.00 (0.71 doing less, N); yyjson validate: 2.21; yyjson sum: 1.23; yyjson select: 1.40; yyjson edit: 1.48; yyjson minify: 1.27 (1.09 doing less, N); yyjson write: 1.16; sonic-cpp validate: no fully validating way (2.32 doing less, U); sonic-cpp sum: no fully validating way (1.26 doing less, U); sonic-cpp select: no fully validating way (1.50 doing less, U); sonic-cpp edit: no fully validating way (1.21 doing less, U); sonic-cpp minify: no fully validating way (1.36 doing less, U); sonic-cpp write: 1.33; simdjson validate: 2.06; simdjson sum: 1.19; simdjson select: 1.33 (0.56 doing less, P); simdjson edit: n/a; simdjson minify: 1.55 (0.18 doing less, P); simdjson write: 2.07; sonic-rs (Rust) validate: 1.90; sonic-rs (Rust) sum: 1.13; sonic-rs (Rust) select: 1.37; sonic-rs (Rust) edit: 1.90; sonic-rs (Rust) minify: 1.75; sonic-rs (Rust) write: 2.01; Boost.J&#8203;SON validate: 1.80; Boost.J&#8203;SON sum: 1.17; Boost.J&#8203;SON select: 2.19; Boost.J&#8203;SON edit: 2.37; Boost.J&#8203;SON minify: 2.65; Boost.J&#8203;SON write: 2.38; nlohmann/json json validate: 1.43; nlohmann/json json sum: 1.00; nlohmann/json json select: 6.54; nlohmann/json json edit: 3.53; nlohmann/json json minify: 4.31; nlohmann/json json write: 1.88; simd-json (Rust) validate: 3.57; simd-json (Rust) sum: 1.91; simd-json (Rust) select: 2.61; simd-json (Rust) edit: 2.88; simd-json (Rust) minify: 3.43; simd-json (Rust) write: 2.28; serde_json (Rust) validate: 2.36 (2.11 doing less, U); serde_json (Rust) sum: 2.35; serde_json (Rust) select: 1.75; serde_json (Rust) edit: 4.53; serde_json (Rust) minify: 4.99; serde_json (Rust) write: 2.22; Glaze validate: 2.24; Glaze sum: 4.24 (3.96 doing less, P); Glaze select: 1.39 (0.61 doing less, P); Glaze edit: 5.50; Glaze minify: 5.78 (0.69 doing less, P); Glaze write: 1.95; RapidJSON validate: 5.18 (3.77 doing less, U); RapidJSON sum: 3.25 (2.40 doing less, U); RapidJSON select: 4.45 (3.45 doing less, U); RapidJSON edit: 3.16 (2.68 doing less, U); RapidJSON minify: 3.43 (2.57 doing less, U N); RapidJSON write: 2.86.</desc>
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+<desc id="nj-blog-uc-x86-gcc-d">Table of relative times, libraries by use case. nlohmann/json json_document validate: 1.00; nlohmann/json json_document sum: 1.10; nlohmann/json json_document select: 1.00; nlohmann/json json_document edit: 1.00 (0.78 doing less, N); nlohmann/json json_document minify: 1.00 (0.78 doing less, N); nlohmann/json json_document write: 1.00 (0.64 doing less, N); yyjson validate: 2.23; yyjson sum: 1.31; yyjson select: 1.37; yyjson edit: 1.43; yyjson minify: 1.24 (0.99 doing less, N); yyjson write: 1.08; sonic-cpp validate: no fully validating way (2.32 doing less, U); sonic-cpp sum: no fully validating way (1.26 doing less, U); sonic-cpp select: no fully validating way (1.43 doing less, U); sonic-cpp edit: no fully validating way (1.18 doing less, U); sonic-cpp minify: no fully validating way (1.33 doing less, U); sonic-cpp write: 1.49; simdjson validate: 2.08; simdjson sum: 1.00; simdjson select: 1.29 (0.55 doing less, P); simdjson edit: n/a; simdjson minify: 1.49 (0.17 doing less, P); simdjson write: 2.09; sonic-rs (Rust) validate: 1.98; sonic-rs (Rust) sum: 1.14; sonic-rs (Rust) select: 1.36; sonic-rs (Rust) edit: 1.87; sonic-rs (Rust) minify: 1.68; sonic-rs (Rust) write: 2.05; Boost.J&#8203;SON validate: 1.98; Boost.J&#8203;SON sum: 1.29; Boost.J&#8203;SON select: 2.21; Boost.J&#8203;SON edit: 2.33; Boost.J&#8203;SON minify: 2.54; Boost.J&#8203;SON write: 2.33; nlohmann/json json validate: 1.69; nlohmann/json json sum: 1.17; nlohmann/json json select: 6.20; nlohmann/json json edit: 3.42; nlohmann/json json minify: 4.07; nlohmann/json json write: 1.84; simd-json (Rust) validate: 3.71; simd-json (Rust) sum: 1.93; simd-json (Rust) select: 2.59; simd-json (Rust) edit: 2.83; simd-json (Rust) minify: 3.30; simd-json (Rust) write: 2.34; serde_json (Rust) validate: 2.46 (2.19 doing less, U); serde_json (Rust) sum: 2.38; serde_json (Rust) select: 1.74; serde_json (Rust) edit: 4.45; serde_json (Rust) minify: 4.80; serde_json (Rust) write: 2.27; RapidJSON validate: 3.86 (3.48 doing less, U); RapidJSON sum: 2.35 (2.15 doing less, U); RapidJSON select: 3.17 (3.02 doing less, U); RapidJSON edit: 2.49 (2.40 doing less, U); RapidJSON minify: 2.58 (2.36 doing less, U N); RapidJSON write: 2.94; Glaze validate: 2.87; Glaze sum: 4.05; Glaze select: 1.71 (0.59 doing less, P); Glaze edit: 4.48; Glaze minify: 4.56 (0.75 doing less, P); Glaze write: 1.96.</desc>
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+<text class="nj-charts-cell nj-charts-cell--small" x="206" y="496" text-anchor="middle">1.5 to 2.5</text></g>
+<g><rect class="nj-heat-3" x="248" y="482" width="76" height="20" rx="3"/>
+<text class="nj-charts-cell nj-charts-cell--small" x="286" y="496" text-anchor="middle">2.5 to 5</text></g>
+<g><rect class="nj-heat-4" x="328" y="482" width="76" height="20" rx="3"/>
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+<rect class="nj-heat-na" x="420" y="482" width="40" height="20" rx="3"/>
+<text class="nj-charts-tick" x="440" y="496">n/a</text>
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+</svg>
@@ -11,6 +11,11 @@ that cost, ordered by how much they typically save.
    16.2.0 on macOS (Apple M1 Max). All configurations were run interleaved, in alternating order. They show the order
    of magnitude to expect; measure your own code before and after a change.

+    The two sections on `std::format` and ranges apply to C++20 only and were measured with `-std=c++20`, so their
+    baselines are slower than the others. Their differences are mostly within the run-to-run noise of a few percent:
+    two complete runs of the same configuration differed by up to 10% in the median. The tables show the later run (one
+    outlier cell was repeated).
+
    The translation units are listed below. They replace the ones used for earlier versions of this page, whose
    sources were not published, so the numbers differ from earlier versions.

@@ -66,7 +71,8 @@ that cost, ordered by how much they typically save.
 --8<-- "images/compile_times.svg"
 </div>
 <p class="nj-charts-caption" markdown>Change in compile time at `-O0` against the default configuration of the same
-translation unit, taken from the tables below (medians of nine runs, see above). * computed from the milliseconds in
+translation unit, taken from the tables below (medians of nine runs, see above; the `std::format` and ranges rows are
+measured with `-std=c++20`). * computed from the milliseconds in
 [Options without effect on compile times](#options-without-effect-on-compile-times).</p>

 ## Include `json_fwd.hpp` in headers
@@ -214,6 +220,88 @@ from and to `std::string`; whether that fallback exists depends on the platform'
 (`std::wstring` on Windows), so check code that converts paths. `JSON_NO_IO` additionally removes all stream
 functions (see [Options without effect](#options-without-effect-on-compile-times)).

+## Switch off `std::format` support
+
+With C++20 and a standard library that provides `<format>`, the library includes it to provide a
+[`std::formatter<basic_json>`](../api/basic_json/std_formatter.md) specialization (see
+[`JSON_HAS_STD_FORMAT`](../api/macros/json_has_std_format.md)). If you do not format JSON values with `std::format`,
+switch the detection off for the whole project:
+
+```cmake
+target_compile_definitions(my_target PRIVATE JSON_HAS_STD_FORMAT=0)
+```
+
+| Compiler    | Translation unit | Default (`-O0` / `-O2`) | `std::format` off (`-O0` / `-O2`) | Change     |
+|-------------|------------------|------------------------:|----------------------------------:|-----------:|
+| Apple clang | model            |       1283 ms / 1544 ms |                1269 ms / 1539 ms |  −1% / 0%  |
+| GCC 16      | model            |       2026 ms / 2482 ms |                1944 ms / 2416 ms | −4% / −3%  |
+| Apple clang | parsing          |       1350 ms / 2278 ms |                1347 ms / 2300 ms |  0% / +1%  |
+| GCC 16      | parsing          |       2715 ms / 4351 ms |                2644 ms / 4287 ms | −3% / −1%  |
+
+<p class="nj-table-caption" markdown>Compile time with `JSON_HAS_STD_FORMAT=0` against the default configuration, both with `-std=c++20`, at `-O0` and `-O2`.</p>
+
+The saving is small, and only GCC shows it: libstdc++'s `<format>` is an additional header that nothing else in the
+translation unit includes, so the macro removes it (and the headers it pulls in). With libc++ (Apple clang), other
+standard headers include `<format>` anyway, so the macro only removes the library's own formatter, and the difference is
+within the noise.
+
+The trade-off: the `std::formatter<basic_json>` specialization is removed, so `#!cpp std::format("{}", j)`,
+and `#!cpp std::format_to` with a JSON value no longer compile (in a test with both compilers on
+macOS, the error was that `std::formatter` must be specialized for the type). Use [`dump()`](../api/basic_json/dump.md),
+or the stream operators, instead.
+
+## Switch off ranges support
+
+With C++20 and a standard library that provides `<ranges>`, the library includes it to declare the
+[`items()`](../api/basic_json/items.md) proxy a *borrowed range*, and uses the `std::ranges` concepts and algorithms for
+construction from range views and for iterator input (see [`JSON_HAS_RANGES`](../api/macros/json_has_ranges.md)). If you
+do not need these, switch the detection off for the whole project:
+
+```cmake
+target_compile_definitions(my_target PRIVATE JSON_HAS_RANGES=0)
+```
+
+| Compiler    | Translation unit | Default (`-O0` / `-O2`) | Ranges off (`-O0` / `-O2`) | Change     |
+|-------------|------------------|------------------------:|---------------------------:|-----------:|
+| Apple clang | model            |       1283 ms / 1544 ms |           1237 ms / 1495 ms | −4% / −3%  |
+| GCC 16      | model            |       2026 ms / 2482 ms |           2004 ms / 2464 ms | −1% / −1%  |
+| Apple clang | parsing          |       1350 ms / 2278 ms |           1311 ms / 2284 ms |  −3% / 0%  |
+| GCC 16      | parsing          |       2715 ms / 4351 ms |           2705 ms / 4427 ms |  0% / +2%  |
+
+<p class="nj-table-caption" markdown>Compile time with `JSON_HAS_RANGES=0` against the default configuration, both with `-std=c++20`, at `-O0` and `-O2`.</p>
+
+The saving is small as well, and with GCC it is not distinguishable from the noise: its `<format>` includes `<span>`,
+so with `std::format` support left on, part of the ranges machinery is still parsed.
+Both macros together save more than either alone:
+
+```cmake
+target_compile_definitions(my_target PRIVATE JSON_HAS_STD_FORMAT=0 JSON_HAS_RANGES=0)
+```
+
+| Compiler    | Translation unit | Default (`-O0` / `-O2`) | Both off (`-O0` / `-O2`) | Change     |
+|-------------|------------------|------------------------:|-------------------------:|-----------:|
+| Apple clang | model            |       1283 ms / 1544 ms |         1223 ms / 1504 ms | −5% / −3%  |
+| GCC 16      | model            |       2026 ms / 2482 ms |         1914 ms / 2378 ms | −6% / −4%  |
+| Apple clang | parsing          |       1350 ms / 2278 ms |         1311 ms / 2271 ms |  −3% / 0%  |
+| GCC 16      | parsing          |       2715 ms / 4351 ms |         2635 ms / 4260 ms | −3% / −2%  |
+
+<p class="nj-table-caption" markdown>Compile time with `JSON_HAS_STD_FORMAT=0` and `JSON_HAS_RANGES=0` against the default configuration, both with `-std=c++20`, at `-O0` and `-O2`.</p>
+
+The trade-offs of `JSON_HAS_RANGES=0` are larger than those of the other options on this page:
+
+- `items()` is no longer a borrowed range. On a temporary, `#!cpp std::ranges::begin(make_json().items())` no longer
+  compiles, and `std::ranges` algorithms such as `#!cpp std::ranges::find_if(make_json().items(), pred)` return
+  `std::ranges::dangling` instead of an iterator, so code that uses the result no longer compiles. Calling them on
+  `#!cpp j.items()` for a named `j` is not affected.
+- [`JSON_HAS_RANGE_VIEW_CONVERSION`](../api/macros/json_has_range_view_conversion.md) becomes `0`, so a JSON array can no
+  longer be constructed from a `std::ranges::view` such as the result of `std::views::filter`. The assignment
+  `#!cpp json j = v | std::views::filter(pred);` no longer compiles.
+- Parsing from an iterator pair loses the C++20 fast path for contiguous iterators that are not pointers (for
+  example those of `std::vector`) and falls back to byte-at-a-time scanning. The result is the same; parsing may be
+  slower (not measured here).
+
+The first two were checked with both compilers on macOS; the third is read from the library's source.
+
 ## Use C++20 modules

 With a toolchain that supports named modules, `import nlohmann.json;` compiles the library once into a module and
@@ -343,6 +431,8 @@ and −2% / 0% (GCC). To get a saving, combine it with

 - [`JSON_HAS_FILESYSTEM`](../api/macros/json_has_filesystem.md) - control the conversions from and to
  `std::filesystem::path`
+- [`JSON_HAS_STD_FORMAT`](../api/macros/json_has_std_format.md) - control the `std::formatter` specialization
+- [`JSON_HAS_RANGES`](../api/macros/json_has_ranges.md) - control the use of `std::ranges`
 - [`JSON_NO_AUTOMATIC_UDLS`](../api/macros/json_no_automatic_udls.md) - do not include the user-defined string
  literals automatically
 - [Modules](../features/modules.md) - C++20 module support
@@ -1,7 +1,8 @@
 /*
 * Marks links that leave the site with the class "nj-external", which brand.css turns into a small icon in front of
 * the link. A link is external when its host is neither the current one nor the production site. Links in the page
- * actions (edit, raw), buttons, header anchors, and links that only wrap an image (badges) are left alone.
+ * actions (edit, raw), buttons, header anchors, a blog post's byline, and links that only wrap an image (badges) are
+ * left alone.
 * Runs through Material's document$ (navigation.instant), so it also applies after an instant page switch.
 */
 (function () {
@@ -17,7 +18,7 @@
            if (a.protocol !== "http:" && a.protocol !== "https:") {
                continue;
            }
-            if (a.matches(".md-button, .md-content__button, .headerlink") || a.querySelector("img, svg")) {
+            if (a.matches(".md-button, .md-content__button, .headerlink, .nj-byline a") || a.querySelector("img, svg")) {
                continue;
            }
            a.classList.add("nj-external");
@@ -104,3 +104,72 @@
        init();
    }
 })();
+
+/* figures: the tooltips of the heatmaps in home/blog/how_3_13_0_got_faster.md (perf_blog_usecases_*.svg). Each
+   cell is a focusable <g data-tip>: its lines (the first one the heading) are shown on hover, keyboard focus or tap.
+   Without JS, the figure's <desc> and the tables in the appendix carry the same numbers. */
+(function () {
+    "use strict";
+
+    var tip = null;
+    var current = null;
+
+    function show(cell) {
+        if (!tip) {
+            tip = document.createElement("div");
+            tip.className = "nj-heat-tip";
+            tip.setAttribute("role", "tooltip");
+            tip.hidden = true;
+            document.body.appendChild(tip);
+        }
+        if (current) current.classList.remove("nj-heat-on");
+        current = cell;
+        cell.classList.add("nj-heat-on");
+        var lines = (cell.getAttribute("data-tip") || "").split("\n");
+        tip.textContent = "";
+        lines.forEach(function (line, i) {
+            var el = document.createElement(i === 0 ? "strong" : "div");
+            el.textContent = line;
+            tip.appendChild(el);
+        });
+        tip.hidden = false;
+        var r = cell.getBoundingClientRect();
+        var w = tip.offsetWidth, h = tip.offsetHeight;
+        var x = Math.min(Math.max(8, r.left + r.width / 2 - w / 2), document.documentElement.clientWidth - w - 8);
+        var y = r.bottom + 8 + h > window.innerHeight ? r.top - h - 8 : r.bottom + 8;
+        tip.style.left = (x + window.scrollX) + "px";
+        tip.style.top = (y + window.scrollY) + "px";
+    }
+
+    function hide() {
+        if (current) current.classList.remove("nj-heat-on");
+        current = null;
+        if (tip) tip.hidden = true;
+    }
+
+    function init() {
+        hide();
+        Array.prototype.forEach.call(document.querySelectorAll("svg.nj-charts--heat .nj-heat-cell"), function (cell) {
+            if (cell.dataset.njHeatReady) return;
+            cell.dataset.njHeatReady = "1";
+            cell.addEventListener("mouseenter", function () { show(cell); });
+            cell.addEventListener("mouseleave", hide);
+            cell.addEventListener("focus", function () { show(cell); });
+            cell.addEventListener("blur", hide);
+            // a tap also focuses the cell; a tap elsewhere or Escape hides the tooltip
+            cell.addEventListener("click", function (ev) { ev.stopPropagation(); show(cell); });
+        });
+    }
+
+    document.addEventListener("click", hide);
+    document.addEventListener("keydown", function (ev) { if (ev.key === "Escape") hide(); });
+    window.addEventListener("scroll", hide, { passive: true });
+
+    if (typeof document$ !== "undefined" && document$ && typeof document$.subscribe === "function") {
+        document$.subscribe(init);
+    } else if (document.readyState === "loading") {
+        document.addEventListener("DOMContentLoaded", init);
+    } else {
+        init();
+    }
+})();
@@ -8,6 +8,7 @@
 *[BDFL]: Benevolent Dictator for Life
 *[BJData]: Binary JData
 *[BON8]: Binary Object Notation 8
+*[BSL]: Boost Software License
 *[BSON]: Binary JSON
 *[CBOR]: Concise Binary Object Representation
 *[CC0]: Creative Commons Zero
@@ -16,6 +17,7 @@
 *[CUDA]: Compute Unified Device Architecture
 *[CVE]: Common Vulnerabilities and Exposures
 *[DOM]: Document Object Model
+*[EDG]: Edison Design Group, maker of a C++ compiler front end
 *[EOF]: End of File
 *[FAQ]: Frequently Asked Questions
 *[GCC]: GNU Compiler Collection
@@ -31,9 +33,11 @@
 *[JSONC]: JSON with Comments
 *[JWCC]: JSON With Commas and Comments
 *[LLDB]: LLVM Debugger
+*[LTO]: Link-Time Optimization
 *[LTS]: Long-Term Support
 *[MinGW]: Minimalist GNU for Windows
 *[MIT]: Massachusetts Institute of Technology
+*[MPL]: Mozilla Public License
 *[MsgPack]: MessagePack
 *[MSVC]: Microsoft Visual C++
 *[NaN]: Not a Number
@@ -42,6 +46,7 @@
 *[NEON]: Arm SIMD instruction set extension
 *[NUL]: Null character (U+0000, byte value 0)
 *[ODR]: One Definition Rule
+*[PCH]: Precompiled Header
 *[REUSE]: Software licensing specification by the Free Software Foundation Europe
 *[RFC]: Request for Comments
 *[RTTI]: Runtime Type Information
@@ -60,3 +65,4 @@
 *[UDLs]: User-defined literals
 *[URL]: Uniform Resource Locator
 *[UTF]: Unicode Transformation Format
+*[XOR]: Exclusive or
@@ -104,6 +104,8 @@ nav:
          - 'v2.0.0': home/releases/v2.0.0.md
          - 'v1.1.0': home/releases/v1.1.0.md
          - 'v1.0.0': home/releases/v1.0.0.md
+      - Blog:
+          - 'How 3.13.0 got faster': home/blog/how_3_13_0_got_faster.md
      - home/design_goals.md
      - home/architecture.md
      - home/customers.md
@@ -130,6 +132,7 @@ nav:
          - features/element_access/unchecked_access.md
          - features/element_access/checked_access.md
          - features/element_access/default_value.md
+      - features/files.md
      - features/iterators.md
      - features/merge_patch.md
      - features/json_patch.md
@@ -609,6 +612,7 @@ plugins:
        Home:
          - index.md
          - home/*.md
+          - home/blog/*.md
        Features:
          - features/*.md
          - features/binary_formats/*.md
@@ -1,8 +1,8 @@
 wheel==0.48.0

 mkdocs==1.6.1                                       # documentation framework
-mkdocs-git-revision-date-localized-plugin==1.6.0    # plugin "git-revision-date-localized"
-mkdocs-material==9.7.7                             # theme for mkdocs
+mkdocs-git-revision-date-localized-plugin==1.6.2    # plugin "git-revision-date-localized"
+mkdocs-material==9.8.0                             # theme for mkdocs
 mkdocs-material-extensions==1.3.1                   # extensions
 mkdocs-minify-plugin==0.8.0                         # plugin "minify"
 mkdocs-redirects==1.2.3                             # plugin "redirects"
@@ -73,6 +73,8 @@ COMPILE = [
    ("JSON_NO_AUTOMATIC_UDLS", "parsing TU", -1, -2, False),
    ("JSON_HAS_FILESYSTEM=0 + JSON_NO_IO", "model TU", -8, -11, False),
    ("JSON_HAS_FILESYSTEM=0", "model TU", -5, -9, False),
+    ("JSON_HAS_STD_FORMAT=0", "model TU", -1, -4, False),
+    ("JSON_HAS_RANGES=0", "model TU", -4, -1, False),
    # computed from the ms in "Options without effect on compile times": 1034/1051, 1756/1801, 1055/1051, 1783/1801
    ("JSON_NO_IO", "model TU", round((1034 / 1051 - 1) * 100), round((1756 / 1801 - 1) * 100), True),
    ("JSON_USE_GLOBAL_UDLS=0", "model TU", round((1055 / 1051 - 1) * 100), round((1783 / 1801 - 1) * 100), True),
@@ -0,0 +1,183 @@
+benchmark,unit,3.12.0,3.13.0,speedup
+Accept/canada,ns,1.27789e+07,1.34304e+06,9.515
+Accept/citm_catalog,ns,6.47666e+06,474064,13.662
+Accept/floats,ns,1.14227e+08,1.72173e+07,6.634
+Accept/jeopardy,ns,2.18081e+08,2.79002e+07,7.816
+Accept/signed_ints,ns,1.15981e+08,2.33778e+07,4.961
+Accept/small_signed_ints,ns,5.64996e+07,1.31818e+07,4.286
+Accept/twitter,ns,2.48725e+06,234277,10.617
+Accept/unsigned_ints,ns,1.14729e+08,2.28147e+07,5.029
+BinaryToCbor/1024,ns,315.368,108.041,2.919
+BinaryToCbor/128,ns,266.074,114.105,2.332
+BinaryToCbor/16,ns,246.212,49.912,4.933
+BinaryToCbor/16384,ns,950.054,418.045,2.273
+BinaryToCbor/2048,ns,340.213,126.796,2.683
+BinaryToCbor/256,ns,279.79,91.7512,3.049
+BinaryToCbor/32,ns,262.471,50.3433,5.214
+BinaryToCbor/32768,ns,1578.4,837.8,1.884
+BinaryToCbor/4096,ns,431.963,174.276,2.479
+BinaryToCbor/512,ns,296.768,102.073,2.907
+BinaryToCbor/64,ns,259.159,84.2641,3.076
+BinaryToCbor/8,ns,250.574,49.9122,5.020
+BinaryToCbor/8192,ns,527.418,253.616,2.080
+Copy/canada,ns,3.68841e+06,2.9017e+06,1.271
+Copy/citm_catalog,ns,1.64706e+06,1.48507e+06,1.109
+Copy/twitter,ns,810558,728698,1.112
+CopyAssign/canada,ns,3.73912e+06,2.94393e+06,1.270
+CopyAssign/citm_catalog,ns,1.6545e+06,1.53713e+06,1.076
+CopyAssign/twitter,ns,817997,752415,1.087
+CopyOnly/canada,ns,1.53602e+06,1.52075e+06,1.010
+CopyOnly/citm_catalog,ns,754817,794741,0.950
+CopyOnly/twitter,ns,406966,410330,0.992
+CopyRing/canada,ns,3.74734e+06,2.92592e+06,1.281
+CopyRing/citm_catalog,ns,1.7477e+06,1.54757e+06,1.129
+CopyRing/twitter,ns,876191,784261,1.117
+DestroyOnly/canada,ns,2.16216e+06,1.38217e+06,1.564
+DestroyOnly/citm_catalog,ns,895535,681877,1.313
+DestroyOnly/twitter,ns,406450,326620,1.244
+Diff/canada,ns,3.91782e+07,3.75209e+06,10.442
+Diff/citm_catalog,ns,6.91552e+06,1.09211e+06,6.332
+Diff/twitter,ns,4.92965e+06,639734,7.706
+Dump/canada / -,ns,6.70617e+06,2.31399e+06,2.898
+Dump/canada / 4,ns,8.81664e+06,3.03083e+06,2.909
+Dump/citm_catalog / -,ns,1.39132e+06,295525,4.708
+Dump/citm_catalog / 4,ns,1.94729e+06,421536,4.620
+Dump/floats / -,ns,6.35321e+07,2.37757e+07,2.672
+Dump/floats / 4,ns,7.19879e+07,2.4663e+07,2.919
+Dump/jeopardy / -,ns,2.0176e+08,3.0624e+07,6.588
+Dump/jeopardy / 4,ns,2.20493e+08,3.43504e+07,6.419
+Dump/signed_ints / -,ns,2.36853e+07,1.07405e+07,2.205
+Dump/signed_ints / 4,ns,3.2029e+07,1.13731e+07,2.816
+Dump/small_signed_ints / -,ns,1.78623e+07,7.93339e+06,2.252
+Dump/small_signed_ints / 4,ns,2.50508e+07,8.80939e+06,2.844
+Dump/twitter / -,ns,1.40813e+06,213513,6.595
+Dump/twitter / 4,ns,1.59095e+06,249353,6.380
+Dump/unsigned_ints / -,ns,2.35653e+07,8.07378e+06,2.919
+Dump/unsigned_ints / 4,ns,3.17269e+07,8.50708e+06,3.729
+Equal/canada,ns,463162,336269,1.377
+Equal/citm_catalog,ns,264124,260967,1.012
+Equal/twitter,ns,138843,128906,1.077
+Flatten/canada,ns,2.86941e+07,1.1214e+07,2.559
+Flatten/citm_catalog,ns,6.4406e+06,3.00538e+06,2.143
+Flatten/twitter,ns,3.53051e+06,2.05449e+06,1.718
+FlattenOrdered/citm_catalog,ns,2.56371e+08,1.40896e+06,181.958
+FlattenOrdered/twitter,ns,5.00313e+07,863594,57.934
+FromBinaryBuffer/bjdata / canada,ns,8.15141e+06,4.17154e+06,1.954
+FromBinaryBuffer/bjdata / twitter,ns,3.18297e+06,893076,3.564
+FromBinaryBuffer/bjdata_optimized / canada,ns,8.73882e+06,2.42167e+06,3.609
+FromBinaryBuffer/bjdata_optimized / twitter,ns,3.15905e+06,884856,3.570
+FromBinaryBuffer/bson / canada,ns,9.33283e+06,4.27358e+06,2.184
+FromBinaryBuffer/bson / citm_catalog,ns,3.91854e+06,1.61073e+06,2.433
+FromBinaryBuffer/bson / twitter,ns,3.176e+06,910290,3.489
+FromBinaryBuffer/cbor / canada,ns,8.39002e+06,2.08256e+06,4.029
+FromBinaryBuffer/cbor / citm_catalog,ns,3.71495e+06,1.31999e+06,2.814
+FromBinaryBuffer/cbor / floats,ns,2.91606e+07,5.48446e+06,5.317
+FromBinaryBuffer/cbor / jeopardy,ns,3.52964e+08,1.00739e+08,3.504
+FromBinaryBuffer/cbor / signed_ints,ns,3.59874e+07,9.77712e+06,3.681
+FromBinaryBuffer/cbor / twitter,ns,3.08997e+06,878827,3.516
+FromBinaryBuffer/msgpack / canada,ns,8.25869e+06,2.09779e+06,3.937
+FromBinaryBuffer/msgpack / citm_catalog,ns,3.71825e+06,1.28675e+06,2.890
+FromBinaryBuffer/msgpack / jeopardy,ns,3.56624e+08,9.69017e+07,3.680
+FromBinaryBuffer/msgpack / twitter,ns,3.06392e+06,850067,3.604
+FromBinaryBuffer/ubjson / canada,ns,8.12649e+06,4.14411e+06,1.961
+FromBinaryBuffer/ubjson / citm_catalog,ns,3.82184e+06,1.65659e+06,2.307
+FromBinaryBuffer/ubjson / jeopardy,ns,3.65507e+08,1.01303e+08,3.608
+FromBinaryBuffer/ubjson / twitter,ns,3.15221e+06,895746,3.519
+FromBinaryBuffer/ubjson_optimized / canada,ns,8.5126e+06,2.38858e+06,3.564
+FromBinaryBuffer/ubjson_optimized / twitter,ns,3.12199e+06,882166,3.539
+FromBinaryFile/bjdata / twitter,ns,1.04222e+07,1.45214e+06,7.177
+FromBinaryFile/bson / twitter,ns,1.02874e+07,1.23514e+06,8.329
+FromBinaryFile/cbor / canada,ns,1.43434e+07,2.4071e+06,5.959
+FromBinaryFile/cbor / twitter,ns,9.92359e+06,1.075e+06,9.231
+FromBinaryFile/ubjson / canada,ns,1.35516e+07,6.2336e+06,2.174
+FromBinaryFile/ubjson / twitter,ns,1.05159e+07,1.46077e+06,7.199
+FromBinaryShape/containers / bjdata,ns,1.43175e+07,7.24204e+06,1.977
+FromBinaryShape/containers / bson,ns,1.74215e+07,7.97531e+06,2.184
+FromBinaryShape/containers / cbor,ns,1.3898e+07,3.93021e+06,3.536
+FromBinaryShape/containers / msgpack,ns,1.378e+07,3.88449e+06,3.547
+FromBinaryShape/containers / ubjson,ns,1.44223e+07,7.2737e+06,1.983
+FromBinaryShape/containers / ubjson_optimized,ns,1.49736e+07,4.48674e+06,3.337
+FromBinaryShape/nested / bjdata,ns,96363.9,38197.9,2.523
+FromBinaryShape/nested / bson,ns,102515,42496.1,2.412
+FromBinaryShape/nested / cbor,ns,93842.1,35385.5,2.652
+FromBinaryShape/nested / msgpack,ns,92033,34888.5,2.638
+FromBinaryShape/nested / ubjson,ns,96455.9,37922.6,2.543
+FromBinaryShape/scalars / bjdata,ns,2.48048e+07,1.1476e+07,2.161
+FromBinaryShape/scalars / cbor,ns,2.56641e+07,5.68711e+06,4.513
+FromBinaryShape/scalars / msgpack,ns,2.44254e+07,5.56716e+06,4.387
+FromBinaryShape/scalars / ubjson,ns,2.49328e+07,1.15997e+07,2.149
+FromCborChunkedString/10000 chunks,ns,90902.3,61512.6,1.478
+FromMsgpack/canada,ns,1.43596e+07,2.40425e+06,5.973
+FromMsgpack/citm_catalog,ns,9.03526e+06,1.66705e+06,5.420
+FromMsgpack/floats,ns,5.97879e+07,2.82314e+07,2.118
+FromMsgpack/jeopardy,ns,1.14023e+09,1.1207e+08,10.174
+FromMsgpack/signed_ints,ns,6.30943e+07,3.27435e+07,1.927
+FromMsgpack/small_signed_ints,ns,6.34225e+07,3.52538e+07,1.799
+FromMsgpack/twitter,ns,9.99383e+06,1.01241e+06,9.871
+FromMsgpack/unsigned_ints,ns,5.61151e+07,2.82024e+07,1.990
+"GetArray<std::array<int, 1000>>",ns,2242.43,641.094,3.498
+GetArray<std::deque<int>>,ns,8157.44,1172.81,6.955
+GetArray<std::set<int>>,ns,58833.4,41553,1.416
+GetArray<std::vector<int>>,ns,6725.67,670.816,10.026
+GetMap/citm_catalog,ns,3.44193e+06,2.43771e+06,1.412
+GetVectorDouble/floats,ns,6.7017e+06,650766,10.298
+GetVectorInt/signed_ints,ns,8.06579e+06,3.40643e+06,2.368
+Iterate/canada,ns,873618,445143,1.963
+Iterate/citm_catalog,ns,301801,157823,1.912
+Iterate/twitter,ns,87345,58936.4,1.482
+JsonPointerAt/citm_catalog,ns,1.85369e+06,1.1599e+06,1.598
+JsonPointerAt/twitter,ns,791487,599585,1.320
+JsonPointerContains/citm_catalog,ns,2.73824e+06,1.25465e+06,2.182
+JsonPointerContains/twitter,ns,1.32403e+06,620312,2.134
+JsonPointerParse/citm_catalog,ns,5.72778e+06,2.21453e+06,2.586
+JsonPointerParse/twitter,ns,2.4672e+06,1.00864e+06,2.446
+JsonPointerToString/citm_catalog,ns,6.65484e+06,1.89788e+06,3.506
+JsonPointerToString/twitter,ns,2.13903e+06,811916,2.635
+ParseFILE/canada,ns,5.29148e+07,6.01689e+06,8.794
+ParseFILE/citm_catalog,ns,3.49593e+07,2.34075e+06,14.935
+ParseFILE/twitter,ns,1.38263e+07,1.34963e+06,10.245
+ParseFile/canada,ns,1.76922e+07,6.22534e+06,2.842
+ParseFile/citm_catalog,ns,7.85962e+06,2.47244e+06,3.179
+ParseFile/floats,ns,1.29413e+08,4.83839e+07,2.675
+ParseFile/jeopardy,ns,3.30328e+08,1.56161e+08,2.115
+ParseFile/signed_ints,ns,1.27675e+08,4.65862e+07,2.741
+ParseFile/small_signed_ints,ns,6.44651e+07,3.33577e+07,1.933
+ParseFile/twitter,ns,3.39729e+06,1.37932e+06,2.463
+ParseFile/unsigned_ints,ns,1.23326e+08,4.73146e+07,2.607
+ParseIndented/canada / 4,ns,3.41603e+07,4.60976e+06,7.410
+ParseIndented/citm_catalog / 4,ns,7.45491e+06,1.45798e+06,5.113
+ParseIndented/jeopardy / 4,ns,3.38801e+08,1.14349e+08,2.963
+ParseIndented/twitter / 4,ns,3.61322e+06,975391,3.704
+ParseStreamValues/ndjson,ns,7.07974e+06,3.7154e+06,1.906
+ParseStreamValues/numbers,ns,1.92884e+06,388042,4.971
+ParseString/canada,ns,1.52389e+07,3.73427e+06,4.081
+ParseString/citm_catalog,ns,7.40128e+06,1.44821e+06,5.111
+ParseString/floats,ns,1.19856e+08,2.49654e+07,4.801
+ParseString/jeopardy,ns,3.03449e+08,1.13053e+08,2.684
+ParseString/signed_ints,ns,1.21175e+08,2.86805e+07,4.225
+ParseString/small_signed_ints,ns,6.07636e+07,1.77037e+07,3.432
+ParseString/twitter,ns,3.21074e+06,920551,3.488
+ParseString/unsigned_ints,ns,1.20011e+08,2.85056e+07,4.210
+ParseStringOrdered/canada,ns,1.52544e+07,3.77964e+06,4.036
+ParseStringOrdered/citm_catalog,ns,1.09927e+07,1.34339e+06,8.183
+ParseStringOrdered/jeopardy,ns,3.60435e+08,9.81296e+07,3.673
+ParseStringOrdered/twitter,ns,4.41151e+06,803859,5.488
+Patch/canada,ns,1.01249e+07,3.41425e+06,2.965
+Patch/citm_catalog,ns,2.54415e+06,1.65413e+06,1.538
+Patch/twitter,ns,1.4932e+06,870217,1.716
+SaxParse/canada,ns,1.28611e+07,2.49889e+06,5.147
+SaxParse/citm_catalog,ns,6.43798e+06,655372,9.823
+SaxParse/twitter,ns,2.48859e+06,334038,7.450
+ToCbor/canada,ns,1.39101e+06,554952,2.507
+ToCbor/citm_catalog,ns,1.0334e+06,260397,3.969
+ToCbor/floats,ns,8.93763e+06,1.84589e+06,4.842
+ToCbor/jeopardy,ns,7.14785e+07,2.10551e+07,3.395
+ToCbor/signed_ints,ns,1.13863e+07,2.74211e+06,4.152
+ToCbor/small_signed_ints,ns,1.02822e+07,2.37622e+06,4.327
+ToCbor/twitter,ns,636979,144369,4.412
+ToCbor/unsigned_ints,ns,8.04576e+06,2.74066e+06,2.936
+ToJsonStrings/copy,ns,5.85988e+06,5.60056e+06,1.046
+ToJsonStrings/move,ns,5.92335e+06,3.04643e+06,1.944
+Unflatten/canada,ns,4.17811e+07,1.08132e+07,3.864
+Unflatten/citm_catalog,ns,9.80315e+06,3.53672e+06,2.772
+Unflatten/twitter,ns,4.56968e+06,2.16566e+06,2.110
@@ -0,0 +1,361 @@
+index,commit,date,pr,subject,parse_twitter,parse_citm,parse_canada,parse_citm_compact,parse_twitter_ifstream,accept_twitter,dump_twitter,dump_citm,dump_canada,dump4_citm,from_cbor_twitter,to_cbor_twitter,copy_destroy_citm,equal_citm,view_parse_twitter,view_parse_citm,view_parse_canada
+0,55f93686c0,2025-04-11,,Merge branch 'release/3.12.0',3571.487,8219.609,17049.073,4366.792,3846.006,2394.213,1441.213,1375.446,7510.989,1917.809,3463.281,695.524,1643.327,1956.891,,,
+1,1705bfe914,2025-04-11,4727,:bookmark: set version to 3.12.0 (#4727),3589.331,8245.422,17079.250,4422.711,3894.787,2397.597,1440.546,1377.745,7514.698,1922.371,3498.997,695.559,1655.240,1967.301,,,
+2,4cca3b9cb2,2025-04-13,4738,Fix warning and add emscripten CI step (#4738),3559.657,8195.105,17066.291,4373.011,3794.269,2388.900,1419.182,1355.724,7420.703,1912.038,3468.667,664.214,1631.610,1939.475,,,
+3,96c1b52f1c,2025-04-15,4742,Fix conversion to std::optional (#4742),3573.838,8157.276,16993.208,4383.656,3858.927,2395.092,1438.169,1372.208,7497.776,1925.481,3482.185,667.895,1633.619,1946.687,,,
+4,88c92e605c,2025-04-16,4744,Fix compilation failure and warnings with NVHPC (#4744),3563.149,8039.911,16922.739,4381.927,3768.560,2385.086,1407.564,1345.578,7370.063,1897.474,3462.010,662.955,1623.286,1925.804,,,
+5,c67d538274,2025-04-17,4749,Fix C4702 warning and extend MSVC CI job (#4749),3585.422,8251.057,17050.448,4400.542,3896.586,2390.655,1440.391,1371.722,7453.474,1921.277,3478.523,667.911,1636.206,1939.531,,,
+6,756ca22ec5,2025-04-23,4736,Provide fallback for missing `char8_t` support (#4736),3559.146,8139.703,17085.114,4387.658,3856.745,2392.849,1424.997,1370.599,7477.537,1907.661,3484.427,665.541,1634.156,1957.401,,,
+7,6b9199382b,2025-04-27,4763,Add missing header (#4763),3541.323,8077.761,17011.636,4359.183,3842.380,2396.686,1421.116,1363.737,7431.375,1902.909,3474.250,664.442,1625.644,1934.732,,,
+8,3b02afb9d9,2025-04-28,4760,Specialize char_traits for std::byte to fix from_msgpack (fixes #4756) (#4760),3583.070,8198.146,17134.698,4381.743,3899.872,2409.185,1440.233,1380.810,7504.838,1921.781,3500.125,666.078,1657.207,1966.036,,,
+9,eef76c200e,2025-04-28,4764,Make library work with C++20 modules (#4764),3528.529,8080.458,16936.656,4330.570,3764.287,2363.848,1407.851,1358.079,7356.239,1897.423,3455.287,665.194,1632.255,1937.675,,,
+10,dff2b4756c,2025-04-29,4765,fix: BJData size calculation overflow (#4765),3553.706,8141.375,17047.511,4360.144,3797.070,2389.756,1417.737,1364.718,7454.313,1921.962,3479.878,666.456,1644.760,1944.696,,,
+11,9110918cf8,2025-05-04,4748,Fix typos (#4748),3563.682,8176.427,17239.354,4398.055,3891.669,2399.782,1441.669,1387.133,7516.073,1925.323,3483.271,669.348,1647.760,1957.747,,,
+12,46e7cd3dc2,2025-05-16,4775,Replace deprecated std::is_trivial in C++26 (#4775),3565.242,8195.396,17135.646,4373.479,3851.604,2392.258,1418.425,1370.958,7464.854,1909.844,3485.046,665.606,1643.155,1952.329,,,
+13,828c891427,2025-05-16,4786,Extend type_name() to invalid type (#4786),3549.573,8103.761,17066.198,4359.911,3804.849,2389.121,1428.584,1366.405,7424.838,1914.434,3452.497,667.452,1632.750,1928.324,,,
+14,4b17f90f65,2025-05-22,4609,Add `ignore_trailing_commas` option (#4609),3544.662,8132.052,16997.375,4344.592,3825.765,2382.755,1408.435,1367.468,7460.448,1924.522,3434.062,733.089,1631.356,1891.572,,,
+15,b19f058465,2025-06-01,4802,Encode infinity and NaN as float for MsgPack and CBOR (#4802),3550.020,8126.438,17350.885,4327.596,3825.419,2389.356,1409.422,1376.649,7363.802,1921.226,3441.081,683.190,1624.144,1886.388,,,
+16,cf16c5ab9f,2025-06-02,4805,Use binary_t::value_type (#4805),3551.735,8143.521,17153.291,4309.477,3829.229,2387.640,1428.550,1385.585,7415.271,1932.347,3425.838,657.735,1631.586,1888.954,,,
+17,d70e46bc65,2025-06-25,4830,:bug: add missing header to input_adapters.hpp (#4830),3546.448,8157.469,17062.364,4335.300,3805.221,2382.796,1422.863,1382.581,7411.401,1928.676,3433.190,691.842,1632.972,1892.453,,,
+18,30d27df61c,2025-07-31,4871,Fix CI (#4871),3570.015,8150.859,17070.625,4330.078,3806.505,2400.329,1434.947,1381.065,7425.718,1931.556,3429.632,656.545,1633.515,1892.916,,,
+19,efcf9efb4f,2025-08-02,4873,Fixes #4854 Explicitly handle nullptr in sax_parse (#4873),3520.381,8050.719,16883.042,4331.820,3861.906,2368.069,1408.435,1375.954,7363.651,1898.466,3432.992,653.988,1634.141,1894.948,,,
+20,4106af8d92,2025-08-20,4896,":rotating_light: suppress cppcoreguidelines-c-copy-assignment-signature,misc-unconventional-assign-operator (#4896)",3540.599,8175.265,17010.438,4345.182,3866.833,2393.935,1435.100,1389.496,7453.724,1945.791,3433.169,657.446,1638.434,1900.360,,,
+21,a63795caf1,2025-10-22,4791,:rotating_light: avoid deprecation warning (#4791),3550.057,8174.646,16983.177,4363.521,3888.336,2393.305,1423.434,1376.334,7469.407,1936.013,3447.279,666.706,1645.354,1903.707,,,
+22,1cc56b2dcd,2025-10-23,4957,Address CWG issue 2521 (#4957),3557.396,8119.651,17072.730,4351.881,3834.739,2386.097,1442.100,1393.245,7474.463,1932.315,3446.883,660.187,1638.983,1896.000,,,
+23,54be9b04f0,2025-10-23,4960,:page_facing_up: update REUSE (#4960),3554.625,8098.287,17115.219,4324.578,3809.950,2390.791,1424.488,1376.715,7422.828,1913.208,3424.693,659.030,1623.405,1892.756,,,
+24,29913ca760,2025-10-25,4963,Add char8_t* overload for _json and _json_pointer (#4963),3544.899,8169.203,17007.844,4353.594,3797.630,2392.108,1423.032,1375.216,7349.787,1909.897,3428.771,655.625,1635.273,1891.018,,,
+25,515d994acb,2026-01-01,5044,:page_facing_up: adjust year (#5044),3524.610,8059.521,16949.416,4313.508,3773.750,2364.742,1410.427,1372.988,7382.438,1915.502,3403.159,643.968,1618.972,1884.213,,,
+26,8f75700141,2026-01-11,4958,support types convertible to string_view as JSON keys (#4958),3546.757,8142.599,17103.386,4327.739,3825.990,2388.540,1420.515,1379.309,7413.062,1924.540,3433.677,658.266,1628.079,1890.759,,,
+27,457bc283ff,2026-01-12,5039,fix(cbor): reject overflowing negative integers (#5039),3508.883,8077.291,16930.011,4305.982,3785.698,2378.693,1425.526,1366.111,7407.042,1929.142,3478.909,657.722,1636.304,1944.681,,,
+28,e3014f162a,2026-01-13,5052,Fix conversion to std::optional (#5052),3547.995,8140.052,17010.031,4321.914,3797.807,2385.856,1430.414,1386.202,7407.260,1930.403,3462.213,657.829,1629.579,1932.066,,,
+29,5ed07097fa,2026-01-13,5050,Fix -Wtautological-constant-out-of-range-compare in serializer (#5050),3544.136,8180.208,17033.209,4339.591,3799.779,2391.940,1427.870,1387.871,7368.765,1922.321,3454.938,659.367,1630.707,1959.722,,,
+30,25f48639c7,2026-01-23,5016,Reference tuple from json (#5016),3563.180,8209.037,17030.969,4388.675,3895.086,2392.088,1430.666,1393.853,7528.567,1934.347,3481.351,677.234,1645.418,1957.591,,,
+31,f8eee1bb79,2026-02-07,5071,Annotate unreachable comment-scanner switch paths to satisfy C26819 (#5071),3508.000,8128.750,16958.959,4315.235,3797.237,2371.963,1425.146,1374.867,7453.381,1930.211,3456.508,658.568,1629.188,1909.736,,,
+32,fd17b0889e,2026-05-08,5139,Remove nullptr safety check from sax_parse functions (#5139),3544.101,8033.021,16963.292,4334.102,3800.736,2382.583,1419.050,1361.745,7357.073,1907.153,3429.315,657.041,1618.815,1937.829,,,
+33,62f3b41b30,2026-05-08,5090,fix: treat single-element brace-init as copy/move instead of wrapping in array (#5074) (#5090),3550.323,8168.713,17060.031,4349.417,3794.110,2380.583,1416.822,1361.182,7369.651,1897.717,3466.731,659.297,1631.463,1941.905,,,
+34,4fad446897,2026-05-10,5162,docs: add IDs to @requirement tags to fix Doxygen autolinking (#5162),3545.440,8031.891,17069.448,4324.698,3802.862,2383.513,1422.768,1384.602,7325.776,1917.606,3469.787,659.011,1631.296,1940.370,,,
+35,a0a4e7cc0b,2026-05-13,5152,Add front methods to json_pointers (implements #4889) (#5152),3582.898,8215.010,17034.448,4345.515,3891.513,2396.572,1432.733,1395.714,7554.119,1934.008,3484.859,659.298,1642.314,1957.356,,,
+36,93e49decbd,2026-05-14,5167,Fix incomplete-type error in set_parents with ordered_json (#5167),3555.224,8147.771,17017.073,4320.846,3831.318,2386.750,1435.840,1385.578,7436.864,1927.483,3466.508,658.409,1632.724,1939.528,,,
+37,7192763f15,2026-05-14,5163,Fix compile error when using nlohmann ordered_map with WITH_DEFAULT macros (#5163),3520.675,8039.145,16892.291,4303.448,3769.198,2363.337,1410.030,1364.679,7380.797,1913.285,3437.278,660.130,1630.738,1943.235,,,
+38,5a05627b1f,2026-05-14,5169,:rotating_light: fix warning (#5169),3600.555,8160.854,16979.031,4324.070,3887.823,2389.157,1430.983,1387.106,7509.984,1912.601,3473.713,663.279,1652.982,1958.774,,,
+39,bb5404bb86,2026-05-15,5164,Fix GCC C++20 modules compilation #5103 (#5164),3543.823,8120.266,17015.395,4349.300,3794.880,2364.178,1414.408,1374.548,7484.218,1920.495,3444.266,699.326,1626.241,1954.688,,,
+40,b1bb9fce0c,2026-05-15,3929,Fix for printing long doubles bug in dump_float (#3929),3549.378,8089.891,16934.927,4313.310,3824.802,2386.958,1412.164,1385.425,7417.869,1930.513,3461.151,651.557,1618.735,1944.450,,,
+41,cba5dc0ed8,2026-05-16,4563,New macros for the named JSON convertor generation (#4563),3544.657,8168.182,16990.886,4327.688,3806.963,2370.975,1421.629,1390.206,7454.151,1919.284,3452.456,677.413,1623.622,1941.921,,,
+42,47202c804a,2026-05-18,5171,Add missing overload to ordered_map::find (#5171),3527.542,8168.312,17141.989,4409.456,3887.378,2397.007,1428.765,1387.033,7495.604,1935.710,3485.088,660.155,1648.977,1951.430,,,
+43,58cfecf7f7,2026-05-18,5151,Serialize enum (#5151),3521.302,8100.104,16805.489,4288.463,3763.971,2381.494,1408.713,1383.059,7328.261,1915.202,3440.372,648.726,1617.661,1922.608,,,
+44,584e6b1cfb,2026-05-22,5187,Fix: update() parent pointers not updated after recursive merge with JSON_DIAGNOSTICS (#5187),3550.639,8083.463,17055.198,4326.833,3804.257,2381.519,1432.039,1381.986,7377.844,1915.159,3460.750,656.873,1631.527,1940.953,,,
+45,02dfbea39d,2026-06-17,5209,added explicit instantiations of 'has_from_json' and 'has_to_json' for std_fs::path (#5209),3552.209,8215.474,17167.760,4338.404,3845.144,2398.026,1425.012,1387.629,7458.614,1931.388,3475.343,658.183,1644.329,1958.324,,,
+46,fc1df0b7db,2026-06-23,5172,:recycle: remove unnecessary if (#5172),3562.088,8175.531,17044.042,4336.583,3863.651,2404.695,1425.872,1389.434,7523.855,1914.128,3481.000,653.259,1639.515,1957.649,,,
+47,c5b2b26fdc,2026-06-29,5217,:memo: fix docs (#5217),3526.825,8052.307,17000.011,4343.963,3793.412,2388.194,1416.706,1374.177,7361.646,1904.008,3463.919,658.322,1627.765,1921.887,,,
+48,b7566c6293,2026-06-30,5161,Harden JSON_HAS_RANGES detection for incomplete C++20 ranges implementations (#5161),3538.995,8071.787,17120.751,4318.797,3772.445,2384.008,1421.440,1385.239,7419.292,1898.929,3431.466,647.948,1602.258,1928.644,,,
+49,adf78d3a76,2026-06-30,5215,Minor: unique_ptr template resolution workaround for MSVC (#5215),3550.380,8138.026,17036.802,4366.062,3842.430,2389.536,1426.658,1385.609,7428.787,1915.233,3467.188,658.332,1636.158,1942.556,,,
+50,272411c5e6,2026-06-30,5218,Overwork project infrastructure (#5218),3547.487,8087.250,16962.198,4341.969,3793.831,2387.509,1420.888,1381.072,7450.078,1930.003,3466.193,659.676,1631.329,1943.043,,,
+51,730b57775d,2026-07-01,5222,:bug: avoid assertion in patch (#5222),3539.912,8169.771,17027.229,4345.151,3790.753,2376.552,1421.263,1386.717,7399.985,1923.237,3455.722,653.609,1630.914,1934.028,,,
+52,ca49ab6123,2026-07-02,5223,Extend value to arrays when using JSON pointers (#5223),3550.341,8113.787,16951.313,4346.805,3793.097,2391.224,1409.695,1380.075,7374.073,1926.401,3458.438,659.382,1629.387,1941.306,,,
+53,8d7e0046f4,2026-07-02,5224,Add std::format and fmt support (#5224),3546.935,8170.406,16968.927,4346.906,3814.956,2387.612,1424.861,1386.542,7350.765,1900.376,3461.177,662.476,1633.858,1930.434,,,
+54,31dd15b258,2026-07-02,5221,Fix ambiguous static_cast (#5221),3551.945,8213.000,17131.271,4373.620,3845.763,2393.074,1438.633,1385.769,7471.146,1927.804,3486.568,662.015,1631.810,1958.901,,,
+55,eed1587000,2026-07-05,5234,Reconstruct lexer diagnostics lazily for seekable input (#120) (#5234),3145.909,5311.094,15381.843,4292.961,3851.260,1966.833,1422.598,1365.461,7443.276,1920.467,3467.060,702.832,1637.587,1905.758,,,
+56,83c87cb9e0,2026-07-05,5233,Read binary strings/blobs in bulk chunks with a memcpy fast path (#5233),3141.867,5259.485,15454.959,4326.664,3797.198,1987.623,1406.492,1372.765,7424.729,1899.726,2363.895,667.502,1630.097,1888.392,,,
+57,acf076a677,2026-07-06,5238,Fix ADL leak of nlohmann::detail through basic_json's default base class (#5238),3152.153,5277.073,15291.407,4338.828,3839.331,1995.524,1429.960,1365.917,7456.776,1907.928,2398.016,670.257,1627.590,1897.997,,,
+58,c05c5e229b,2026-07-07,5241,Add missing copyright notices to SBOM (#5241),3147.485,5268.865,15319.584,4321.823,3796.972,1981.167,1432.689,1371.264,7465.416,1918.083,2388.154,667.119,1630.745,1891.583,,,
+59,366f3d26e5,2026-07-08,5235,Replace snprintf with a branch-free writer for \uXXXX escapes (#5235),3127.641,5272.302,15425.239,4340.459,3850.357,1997.957,1459.603,1356.461,7509.703,1899.916,2366.966,668.383,1624.981,1889.145,,,
+60,f8e99e856c,2026-07-09,5248,Fix nvcc CUDA 12.0/12.1 C++20 ranges parse error (#3907) (#5248),3132.099,5226.375,15164.510,4301.901,3769.651,1967.647,1456.759,1365.810,7530.724,1908.635,2381.610,683.815,1616.699,1879.795,,,
+61,855f511db4,2026-07-09,5250,Fix stale Clang -Weverything suppression comments; drop -Wno-missing-noreturn (#5250),3126.792,5208.338,15352.520,4293.596,3800.544,1969.497,1458.601,1329.851,7372.849,1876.404,2368.894,662.173,1603.881,1874.673,,,
+62,d0a43141ea,2026-07-09,5253,Fix #3868: Remove operator!= to enable P2468R2 rewritten candidate synthesis (#5253),3165.182,5270.458,15479.031,4302.729,3845.646,1989.231,1474.135,1343.312,7443.282,1887.909,2392.523,670.395,1634.871,1894.474,,,
+63,b630f5e9c7,2026-07-10,5260,Fix container input_adapter SFINAE for lvalue-only ADL begin/end (#5260),3128.117,5263.807,15375.677,4330.544,3819.953,1982.196,1454.088,1339.062,7364.683,1877.699,2361.482,666.486,1616.514,1920.626,,,
+64,c60217e801,2026-07-11,5205,fix: support constructing json from C++20 range views (#4916) (#5205),3117.539,5206.552,15308.166,4320.513,3798.713,1983.458,1447.072,1350.950,7357.213,1875.632,2340.731,662.905,1633.357,1934.261,,,
+65,fe2bcc080f,2026-07-11,5266,Custom BinaryType direct assignment (#5266),3174.528,5284.562,15383.645,4328.120,3895.086,1996.913,1478.427,1355.569,7512.115,1899.236,2398.490,672.118,1642.910,1967.660,,,
+66,ca76c37650,2026-07-11,5265,Add iterator+sentinel tests and docs for binary deserializers (#5265),3134.265,5218.021,15352.521,4306.284,3791.612,1967.824,1451.953,1358.685,7508.828,1891.697,2377.848,665.474,1631.495,1934.907,,,
+67,c197feff81,2026-07-12,5268,Extend memcpy fast path to sized sentinels (e.g. std::counted_iterator) (#5268),3116.271,5207.146,15415.771,4272.443,3815.851,1984.966,1451.103,1341.093,7328.037,1865.385,2383.169,664.494,1617.967,1915.428,,,
+68,1c5a953de5,2026-07-19,5276,reject unpaired UTF-16 surrogates in wide-string input (#5276),3155.360,5299.631,15419.812,4302.089,3853.104,1987.259,1468.653,1349.665,7549.432,1911.365,2457.555,680.311,1653.282,1955.673,,,
+69,3565f40229,2026-07-20,5284,reject negative UBJSON/BJData string length (#5284),3170.456,5301.698,15404.416,4351.226,3893.594,1997.034,1470.907,1358.245,7491.480,1909.601,2401.384,671.260,1639.865,1963.899,,,
+70,9a3ebb9456,2026-07-23,5287,validate BSON document size against the bytes read (#5287),3157.646,5264.062,15305.271,4338.672,3839.643,1987.196,1461.356,1351.630,7444.791,1890.626,2398.503,665.262,1655.798,1930.268,,,
+71,8ec98e2c9e,2026-07-27,5313,adding cleanups to bson writer (#5313),3150.448,5268.948,15445.927,4308.612,3805.005,1989.643,1466.348,1349.591,7326.453,1895.842,2393.278,708.164,1644.025,1946.652,,,
+72,2e23687092,2026-07-28,5314,to_bson() silently emits corrupt documents when a length exceeds INT32_MAX (#5314),3146.534,5254.547,15445.250,4304.008,3798.620,1986.260,1459.735,1345.534,7517.651,1903.996,2395.155,674.344,1644.565,1952.682,,,
+73,868506dcc0,2026-07-30,5335,Fix CBOR half-float assertion bounds (#5335),3167.086,5267.068,15397.979,4351.011,3883.135,2003.345,1468.939,1360.483,7455.230,1909.055,2406.305,679.942,1643.646,1945.639,,,
+74,dd24e2dffd,2026-07-30,5332,check all BSON reads and add an EOF check for booleans (#5332),3138.315,5284.833,15399.166,4310.513,3847.630,1980.682,1464.104,1344.108,7445.146,1901.512,2400.532,670.850,1635.196,1900.946,,,
+75,fd72ecfc8c,2026-07-31,5301,validate ndarray element types in write_bjdata_ndarray (#5301),3164.662,5262.141,15399.010,4287.271,3849.318,1988.186,1460.688,1353.767,7458.380,1893.669,2398.485,668.466,1644.018,1921.615,,,
+76,bc48951128,2026-07-31,5323,Fix UBJSON high-precision floating-point overflow handling (#5323),3155.628,5289.864,15474.375,4324.253,3888.966,2015.068,1477.846,1354.622,7480.730,1905.566,2415.428,668.997,1641.776,1911.819,,,
+77,d94cbd99dc,2026-07-31,5274,reject CBOR array/map length equal to the indefinite-length marker (#5274),3144.041,5272.193,15466.980,4338.735,3848.849,1999.231,1459.129,1358.119,7507.307,1901.807,2394.972,667.016,1635.960,1899.878,,,
+78,2222d386c9,2026-07-31,5339,fix: check CBOR tagged subtype reads (#5339),3095.768,5137.792,15064.146,4258.977,3755.229,1965.900,1454.890,1338.066,7399.068,1883.624,2358.193,660.190,1618.172,1939.713,,,
+79,585929bff9,2026-08-03,5289,Fix Clang deprecation warning for json_pointer operator== with ordered_json (#5289),3142.341,5259.360,15258.271,4275.479,3807.672,1969.704,1453.688,1337.633,7451.037,1879.447,2364.966,661.560,1635.617,1945.709,,,
+80,5f121d8c50,2026-08-03,5336,avoid sign extension in char_traits<signed char>::to_int_type (#5336),3145.000,5264.880,15441.521,4269.632,3796.781,1983.497,1440.810,1325.232,7427.750,1880.047,2361.899,663.772,1621.595,1912.378,,,
+81,68f0722a19,2026-08-03,5342,remove discarded array from parent object in end_array (#5342),3161.273,5269.907,15312.469,4335.433,3840.510,1995.965,1465.745,1355.934,7474.901,1895.483,2401.197,657.397,1634.791,1901.902,,,
+82,dca9d49a33,2026-08-05,5348,reject out-of-range code points in UTF-32 wide-string input (#5348),3119.753,5210.979,15209.260,4273.984,3799.034,1995.297,1459.456,1342.982,7431.646,1891.478,2370.364,653.618,1633.585,1882.753,,,
+83,9a091d2b82,2026-08-05,5362,Do not write BJData ndarrays whose size overflows std::size_t (#5362),3137.381,5257.312,15286.084,4308.500,3805.325,1995.140,1468.138,1354.729,7510.088,1893.036,2384.577,659.394,1628.260,1890.245,,,
+84,d5647e6a3b,2026-08-05,5355,Resolve the TODO(niels) in get_ubjson_string (#5355),3121.278,5249.927,15246.011,4292.737,3800.490,1967.087,1443.762,1333.226,7368.953,1862.131,2347.852,644.647,1623.909,1889.958,,,
+85,bacdabd176,2026-08-05,5361,Fix start_pos() for strings containing escape sequences (#5361),3114.653,5251.619,15253.907,4331.818,3786.156,1960.676,1442.388,1330.247,7354.724,1863.306,2351.588,650.781,1623.543,1886.671,,,
+86,1c136a66c4,2026-08-06,5363,Move the CBOR doc block to the function it describes (#5363),3124.274,5209.615,15411.897,4293.320,3812.156,1982.854,1457.653,1345.680,7422.343,1884.848,2387.050,656.076,1627.620,1878.737,,,
+87,6285225fd0,2026-08-12,5211,Fix integer comparison bug (#5211),3159.557,5291.323,15395.395,4329.836,3867.200,1989.476,1456.052,1359.795,7526.860,1879.642,2396.137,659.077,1638.176,1900.416,,,
+88,b5378e8deb,2026-08-19,5331,Fix CBOR tag handlers not recognizing tags 0-5 and 21-23 (#5331),3172.476,5239.812,15479.917,4295.539,3871.289,2003.439,1473.447,1343.742,7516.875,1888.412,2400.572,645.588,1641.621,1886.531,,,
+89,2f025f401e,2026-08-25,5380,Throw other_error.502 when UBJSON use_type is set without use_size (#5380),3155.873,5190.312,15144.406,4286.388,3793.805,1968.199,1442.240,1340.929,7373.610,1860.543,2370.570,648.906,1631.207,1893.750,,,
+90,35705d79d8,2026-08-28,5414,Fix update(merge_objects=true) throwing on primitive-to-object merge (#5414),3169.029,5252.578,15387.292,4340.690,3893.646,1979.616,1472.286,1361.543,7491.302,1903.909,2401.404,659.396,1641.697,1912.409,,,
+91,137a40b9aa,2026-09-05,5459,Compare integers with floats exactly instead of widening the integer (#5459),3134.229,5259.349,15404.541,4300.146,3846.646,1992.155,1467.919,1351.774,7467.146,1887.255,2391.467,660.347,1631.735,1891.751,,,
+92,3c875683a5,2026-09-05,5461,Make diff() linear when an array shrinks (#5461),3141.068,5259.000,15271.166,4319.659,3797.088,1983.450,1455.354,1354.676,7444.860,1891.687,2389.333,657.163,1632.998,1887.016,,,
+93,09b6b6b5ba,2026-09-05,5455,Fix to_bjdata() emitting unparsable output when _ArraySize_ is not an array (#5455),3161.542,5253.047,15311.718,4291.388,3834.264,1992.744,1472.685,1357.680,7409.479,1889.287,2389.501,698.680,1628.237,1888.705,,,
+94,faa35cc647,2026-09-09,5484,Skip integer conversion in accept()/SAX validation when the value is unused (#5484),3103.654,5222.453,15458.573,4215.765,3804.320,1935.161,1468.660,1353.499,7452.052,1883.191,2383.524,654.441,1631.700,1885.664,,,
+95,6d86cc0f6b,2026-09-09,5490,Speed up whitespace skipping in the lexer (#5490),3181.328,5276.318,15307.312,4262.771,3877.401,1977.062,1465.196,1356.119,7594.177,1906.814,2388.615,684.926,1636.950,1893.526,,,
+96,c05347dd54,2026-09-09,5475,Undefine the four JSON_HEDLEY_* macros that leak after including json.hpp (#5475),3147.932,5156.625,15347.990,4217.505,3871.812,1982.807,1458.787,1354.934,7639.328,1879.823,2370.342,674.625,1637.257,1903.903,,,
+97,d6660cf718,2026-09-09,5485,Route hand-rolled diagnostic pragmas through Hedley (#5485),3116.151,5215.531,15257.499,4189.979,3835.023,1974.111,1459.363,1342.996,7553.802,1887.698,2379.999,669.934,1635.350,1877.492,,,
+98,c9477ccf91,2026-09-09,5496,Throw when JSON Patch remove's target path resolves through a primitive or null parent (#5496),3138.841,5258.401,15315.417,4201.008,3874.682,1967.630,1446.393,1335.060,7542.708,1870.111,2390.141,668.484,1634.138,1886.981,,,
+99,8c38e270b5,2026-09-09,5497,Reject JSON Patch move when from is a proper prefix of path (#5497),3183.820,5280.000,15346.969,4222.164,3839.596,1970.753,1470.428,1351.838,7515.344,1895.809,2389.731,673.696,1633.247,1889.546,,,
+100,a316738cfa,2026-09-09,5471,Add JSON_HEDLEY_WARN_UNUSED_RESULT to the current accept() overloads (#5471),3175.891,5281.302,15397.062,4240.576,3934.333,1981.765,1475.890,1353.387,7625.104,1896.181,2401.097,669.729,1646.133,1895.638,,,
+101,c9f1d2d646,2026-09-09,5477,Broaden JSON_HEDLEY_WARN_UNUSED_RESULT coverage to pure query functions (#5477),3171.706,5286.880,15430.844,4264.242,3880.943,1979.990,1472.289,1357.283,7569.854,1904.026,2407.487,671.673,1641.521,1889.053,,,
+102,8e26b9d4b3,2026-09-09,5495,Make contains(json_pointer) return false instead of throwing on unrepresentable array-index tokens (#5495),3163.789,5240.755,15337.698,4226.154,3880.956,1971.912,1475.322,1357.125,7632.281,1904.060,2401.190,678.863,1638.371,1903.385,,,
+103,b17c272f46,2026-09-09,5472,Reserve capacity in from_json() object conversion when the target container supports it (#5472),3152.899,5257.645,15401.000,4210.846,3885.123,1989.159,1476.637,1359.851,7639.396,1898.981,2408.243,670.075,1633.528,1894.086,,,
+104,3e2de32226,2026-09-10,5516,Remove unused iomanip include (#5516),3141.349,5253.657,15364.074,4203.969,3847.620,1968.422,1455.035,1352.754,7582.494,1882.051,2371.814,663.504,1630.172,1870.223,,,
+105,d69fb8654d,2026-09-10,5501,Return the parsed value by move from from_cbor() and friends (#5501),3133.485,5231.662,15309.926,4183.200,3835.662,1971.125,1462.447,1349.563,7479.136,1904.202,1595.991,661.519,1630.278,1883.994,,,
+106,4a93aa4e2f,2026-09-10,5283,"Speed up parsing of contiguous input (numbers, strings, UTF-8) (#5283)",1963.879,4221.308,11609.531,3278.497,3857.880,927.779,1483.726,1357.793,7483.343,1906.916,1481.419,676.438,1643.746,1895.551,,,
+107,bfb07786cd,2026-09-10,5473,Fix to_bjdata() silently truncating out-of-range _ArrayData_ elements (#5473),1941.894,4204.971,11726.688,3264.055,3808.784,923.797,1453.071,1351.760,7458.125,1891.470,1473.508,662.164,1633.043,1888.548,,,
+108,ff80ed3295,2026-09-11,5285,"Speed up dump(), and keep it from overflowing the stack (#5285)",1939.289,4175.541,11781.291,3233.302,3816.101,914.071,441.200,540.473,6895.041,852.214,1478.197,656.635,1632.675,1885.303,,,
+109,da42a627dc,2026-09-11,5449,Stop dump() from heap-allocating its output adapter per call (#5449),1937.658,4200.966,11639.198,3235.493,3827.695,909.901,448.948,537.008,6909.036,839.027,1479.968,659.210,1643.621,1878.065,,,
+110,1dc1d09fc6,2026-09-11,5457,Do not search a container for the value the callback rejected (#5457),1937.459,4140.078,11576.803,3271.838,3845.193,924.316,450.148,539.031,6848.776,844.624,1470.333,671.563,1645.624,1900.347,,,
+111,fae364db24,2026-09-11,5458,Move the scanned string into the value instead of copying it (#5458),1986.146,4110.787,11757.157,3150.932,3830.550,918.517,442.629,539.606,6913.104,843.920,1417.037,655.259,1628.224,1892.991,,,
+112,dd50f0eb16,2026-09-11,5502,Stop CBOR indefinite-length strings from recursing per chunk (#5502),1987.853,4033.182,11613.834,3116.378,3841.164,915.943,442.366,539.480,6864.130,836.458,1431.035,656.146,1599.574,1885.858,,,
+113,4bb2de8cc5,2026-09-11,5503,Reject a nested BJData ndarray dimension vector where it is read (#5503),1981.298,4086.276,11569.240,3141.539,3829.870,923.087,444.038,539.863,6800.724,835.434,1429.637,655.448,1628.999,1879.300,,,
+114,44f8ec30e9,2026-09-11,5504,Bound UBJSON optimized arrays of a valueless type (#5504),2005.265,4092.265,11730.198,3130.635,3863.992,925.033,448.222,542.323,6893.078,849.901,1437.855,662.171,1638.306,1896.324,,,
+115,0dd8ca9023,2026-09-11,5505,Read MessagePack containers without recursing per nesting level (#5505),2019.983,4105.305,11862.979,3142.581,3891.601,927.092,447.942,543.936,6939.963,845.634,1442.889,656.578,1637.512,1897.815,,,
+116,91ab3e81f5,2026-09-11,5506,Read CBOR containers and tags without recursing per nesting level (#5506),1986.334,4039.961,11554.094,3118.761,3783.101,912.504,440.410,534.894,6831.943,834.661,1439.061,655.287,1615.619,1869.912,,,
+117,a14619b354,2026-09-11,5507,Read UBJSON and BJData containers without recursing per nesting level (#5507),2011.959,4095.868,11782.688,3135.264,3873.604,926.014,447.638,541.304,6905.838,846.051,1468.512,664.161,1629.083,1898.772,,,
+118,0452641c18,2026-09-11,5508,Read BSON documents without recursing per nesting level (#5508),1974.160,4043.887,11662.938,3095.011,3832.744,916.007,439.914,534.149,6904.453,835.615,1450.792,648.298,1616.917,1874.133,,,
+119,aa391dc0a5,2026-09-11,5520,Fix two develop CI regressions: dump() nodiscard warning and binary-reader const-correctness (#5520),2003.010,4068.010,11771.364,3137.266,3825.247,924.668,442.416,539.478,6847.083,841.996,1460.659,649.378,1633.738,1885.897,,,
+120,a50c2537eb,2026-09-12,5476,Reserve capped array capacity in json_sax_dom_parser::start_array() for definite-length binary arrays (#5476),1986.488,4063.883,11588.333,3077.995,3827.479,908.419,440.959,539.114,6806.177,833.555,1452.851,662.422,1627.995,1915.388,,,
+121,c0b2878a44,2026-09-13,5493,Swap diagnostic positions in basic_json::swap() (#5493),2010.881,4081.057,11734.730,3130.919,3882.258,925.490,450.092,542.953,6925.188,848.486,1480.051,698.636,1643.508,1933.941,,,
+122,1da2f68992,2026-09-14,5522,Only reserve array capacity if the array type supports it (#5522),1972.122,4048.622,11775.062,3107.938,3803.528,909.385,441.204,535.885,6793.927,842.843,1446.330,658.787,1619.239,1899.164,,,
+123,6487678bc5,2026-09-15,5464,Fix swap(array_t&)/swap(object_t&) to update parent pointers under JSON_DIAGNOSTICS (#5464),2023.028,4116.169,11737.438,3165.172,3893.266,924.912,448.959,541.529,6970.438,852.039,1483.231,689.631,1635.240,1937.356,,,
+124,c72f37a40d,2026-09-15,5443,Support custom object/array types and improve template parameter handling (#5443),2001.617,4076.547,11666.583,3109.756,3918.206,923.197,450.592,542.266,6901.703,846.558,1468.284,660.116,1641.586,1905.840,,,
+125,502e9d66f6,2026-09-16,5479,Fix to_bjdata() emitting the Draft-3-only 'B' marker in default Draft-2 mode (#5479),1970.935,4018.060,11445.500,3079.409,3809.050,910.459,444.217,539.291,6851.407,833.755,1444.697,698.040,1626.601,1889.024,,,
+126,c41152e620,2026-09-16,5494,Fall back to plain-object encoding when to_bjdata()'s _ArrayType_ annotation is not a string (#5494),1979.481,4054.688,11734.292,3085.542,3819.351,916.992,445.126,539.870,6853.005,833.190,1457.166,665.391,1629.586,1888.734,,,
+127,e564136c22,2026-09-22,5465,Make diff() account for member order in ordered_json objects (#5465),1970.519,4063.744,11605.198,3087.497,3848.867,915.695,447.051,539.711,6835.172,841.402,1452.004,664.560,1640.751,1890.473,,,
+128,e485441123,2026-09-22,5466,Restore a duplicate key's prior value when the callback rejects its new value (#5466),2012.920,4099.265,11796.895,3156.818,3913.812,931.464,451.403,541.419,6981.041,846.536,1469.521,704.138,1633.327,1905.709,,,
+129,a2b19d6158,2026-09-22,5467,Honor allow_exceptions=false for excessive array/object size (out_of_range.408) (#5467),1996.478,4084.422,11734.208,3129.099,3850.854,923.499,446.555,539.379,6949.427,842.029,1453.166,694.200,1631.133,1888.865,,,
+130,d2c1a6a272,2026-09-22,5468,"Reject array insert(pos, first, last) iterators not pointing into an array (#5468)",1983.767,4066.651,11618.667,3128.505,3848.427,914.900,447.603,541.973,6915.265,844.307,1458.762,677.699,1638.789,1892.443,,,
+131,0b20b7e622,2026-09-22,5469,Reject MessagePack/BSON binary subtypes that don't fit their wire format (#5469),2010.548,4097.476,11681.218,3121.010,3866.146,925.619,448.533,540.786,6957.000,843.349,1463.518,658.302,1630.857,1902.522,,,
+132,1054b2097e,2026-09-23,5286,Speed up binary writing: value-type output sink + byte-swap number encoding (#5286),1989.739,4101.393,12034.438,3157.240,3853.987,910.115,449.084,555.970,6884.386,864.526,1471.905,656.635,1661.806,1926.233,,,
+133,ed513715a8,2026-09-24,5534,Document that a NUL byte in the input is treated as end of input (#5534),2016.236,4104.763,11906.323,3141.138,3936.240,916.611,455.397,562.053,6987.917,871.110,1475.622,657.877,1676.934,1936.557,,,
+134,56b3ee566c,2026-09-24,5389,Fix stack overflow when copying a deeply nested value (#5387) (#5389),1998.356,4051.206,11660.865,3101.107,3834.672,910.072,452.943,544.464,6908.974,849.212,1460.691,638.644,1650.749,1914.423,,,
+135,918da64657,2026-09-24,5542,Keep BJData ndarray annotations that would not survive a round trip as objects (#5542),2003.009,4042.969,11517.375,3095.122,3815.360,908.444,448.415,539.423,6911.041,840.044,1449.543,671.530,1651.709,1908.408,,,
+136,8699de3064,2026-09-24,5555,Stop allocating the BJData excluded-marker list per container (#5555),2001.718,4071.333,11686.427,3122.065,3796.757,900.895,447.123,539.918,6860.765,844.752,1444.435,646.608,1644.943,1879.295,,,
+137,2e91641de2,2026-09-24,5544,"Test JSON_BRACE_INIT_COPY_SEMANTICS for real, and fix one-element tuples under it (#5544)",2004.785,4083.914,11662.270,3119.602,3917.914,922.465,454.869,547.631,6987.234,853.010,1469.612,649.946,1672.246,1913.098,,,
+138,7c90ec2323,2026-09-24,5546,Hash deeply nested values without recursing per nesting level (#5546),1952.912,4071.159,11594.927,3117.497,3793.052,900.729,444.245,539.787,6854.406,841.264,1457.530,643.139,1638.578,1890.482,,,
+139,4daca40d7b,2026-09-24,5547,Merge deeply nested objects without recursing per nesting level (#5547),2008.226,4104.399,11619.542,3148.604,3918.175,921.207,457.191,547.553,6942.265,855.352,1464.974,651.924,1665.232,1915.869,,,
+140,01b53c8c15,2026-09-25,5552,Keep JSON_DIAGNOSTICS parent pointers of ordered_json members after erase() and update() (#5552),1979.354,4061.378,11603.480,3098.586,3875.258,919.125,455.911,546.269,6940.026,849.511,1461.751,648.841,1660.978,1917.254,,,
+141,abbe52d6de,2026-09-25,5344,Add JSON_PRECISE_STREAM_POSITION to leave the character that terminates a number in the stream (#5344),2001.170,4081.617,11653.531,3131.331,3876.208,915.153,453.436,546.720,6971.864,848.900,1463.182,647.946,1662.943,1906.246,,,
+142,02dd3e67f2,2026-09-25,5390,Fix stack overflow and exponential runtime when comparing nested values (#5390),1987.861,4074.039,11596.000,3161.284,3901.497,919.541,447.553,543.948,6910.162,845.668,1455.759,664.224,1652.074,1930.575,,,
+143,465407f3ce,2026-09-25,2818,Improve error message for const fields (#2818),1975.274,4118.565,11863.448,3130.541,3880.764,910.767,452.904,545.363,6906.890,843.118,1459.728,645.770,1654.265,1934.900,,,
+144,632a5812a8,2026-09-25,5272,Support zero-member types in NLOHMANN_DEFINE_TYPE_* macros (#4041) (#5272),1963.323,4021.526,11747.959,3102.006,3784.896,904.545,444.355,543.748,6840.604,841.416,1438.306,639.223,1649.816,1930.274,,,
+145,d19f7f5dce,2026-09-25,5185,Fix BSON conformance issue (#5185),1958.606,4048.536,11541.011,3086.805,3817.875,900.452,446.001,544.071,6824.323,837.078,1971.245,641.271,1651.209,1934.647,,,
+146,c60a0bc336,2026-09-25,5573,Allocate the deep copy's key scratch space with the provided allocator (#5573),1965.216,4021.459,11630.855,3074.078,3807.258,902.782,444.394,542.562,6919.969,840.942,1975.668,645.827,1637.429,1918.607,,,
+147,1e44262091,2026-09-25,5560,Make JSON_STRICT_NUL_HANDLING part of the ABI tag (#5560),1961.862,4069.617,11594.083,3117.500,3817.758,909.186,448.820,544.420,6845.802,844.016,1977.909,645.864,1651.269,1937.217,,,
+148,95e9a5931c,2026-09-25,5553,"Write BSON in linear time, without recursing per nesting level (#5553)",1965.832,4033.394,11589.364,3120.422,3792.091,905.110,446.984,543.328,6794.244,844.943,1991.659,640.188,1647.675,1928.562,,,
+149,fe4a544c7e,2026-09-27,5515,handled when size exceed uint32 (#5515),1998.244,4047.208,11755.209,3091.776,3815.000,908.733,447.990,546.295,6903.084,850.946,1993.351,645.487,1654.343,1933.385,,,
+150,4fa95d9810,2026-09-27,5583,Remove unreachable branches from the binary writer (#5583),1983.323,4038.331,11666.480,3092.841,3844.935,910.149,449.697,541.110,6840.583,830.604,1979.750,653.542,1650.670,1928.883,,,
+151,6178982b8d,2026-09-27,5582,Compare unordered objects by key below the nesting bound (#5582),1971.706,4073.498,11600.646,3132.700,3830.323,910.231,448.982,538.812,6836.770,846.149,2007.607,657.180,1653.089,1934.675,,,
+152,f7972970a4,2026-09-27,5584,Throw instead of writing MessagePack lengths beyond UINT32_MAX (#5584),1969.417,4013.021,11602.447,3083.552,3842.495,904.223,447.444,542.170,6862.735,839.628,2000.766,655.034,1653.006,1939.922,,,
+153,6bd106893a,2026-09-27,5559,Fix CBOR tag handling in cbor_tag_handler_t::store for non-binary items (#5559),1969.250,4034.693,11691.500,3119.171,3827.860,916.053,455.026,542.577,6886.360,839.718,2012.919,653.031,1651.090,1931.698,,,
+154,1e101ecac1,2026-09-27,2998,Add BON8 support (#2998),1975.804,4082.375,11658.542,3192.828,3758.141,907.029,444.920,556.470,6844.698,849.276,1977.153,649.181,1645.306,1920.836,,,
+155,9e1a09eec0,2026-09-28,5594,Name the key type when rejecting non-string CBOR/MessagePack map keys (#5594),2006.582,4151.784,11788.532,3156.156,3845.052,915.647,454.027,557.846,6814.282,864.094,2021.072,654.095,1663.051,1947.078,,,
+156,fc03b9912e,2026-09-28,5597,"Look up the locale decimal point at conversion time, not lexer construction (#5597)",2020.431,4172.916,12716.958,3196.958,3909.774,910.001,449.314,547.334,6900.968,852.306,2048.019,665.843,1696.937,1982.586,,,
+157,5b9ffae8bb,2026-09-30,5616,Move the float conversion chain out of the lexer (#5616),1992.332,4167.328,12638.573,3212.515,3842.885,906.649,446.941,539.674,6952.672,839.042,2021.057,695.813,1684.689,1967.216,,,
+158,d268eaa693,2026-09-30,5617,Convert floats with Eisel-Lemire when std::from_chars is unavailable (#5617),1987.608,4086.125,11507.062,3170.013,3830.425,898.856,445.077,542.854,6919.568,839.210,2021.918,666.925,1701.466,1951.211,,,
+159,65af260117,2026-09-30,5609,Move instead of deep-copy ordered_json values when an object grows (#5609),1998.981,4134.057,11592.855,3192.779,3863.005,904.702,446.575,539.685,6850.886,840.845,2035.646,680.331,1682.755,1968.744,,,
+160,6a8a7735ed,2026-09-30,5614,Do not throw in contains() for an empty array reference token (#5614),2008.447,4144.024,11612.176,3165.468,3842.060,905.045,443.941,539.755,6846.042,846.248,1998.713,669.752,1684.717,1953.487,,,
+161,0050d0f7a4,2026-09-30,5637,Share one nesting depth limit between all bounded descents (#5637),2021.078,4170.581,11589.886,3224.963,3937.021,906.411,448.033,541.177,6911.391,848.641,2040.978,670.005,1703.593,1984.639,,,
+162,68beba727c,2026-09-30,5679,Fix from_json() for enums with underlying type bool (#5679),1986.468,4139.033,11632.833,3201.351,3798.006,888.464,438.471,535.903,6843.110,836.030,1996.109,685.053,1672.430,1940.598,,,
+163,fc4c9c3446,2026-09-30,5680,Fix clear() to also reset the subtype of a binary value (#5680),1972.561,4094.867,11540.157,3155.722,3833.925,893.243,445.764,539.739,6848.562,843.068,2016.293,664.788,1685.759,1965.342,,,
+164,678fd3017b,2026-09-30,5681,Fix element path for map/unordered_map JSON_DIAGNOSTICS errors (#5681),2014.783,4164.471,11563.614,3219.865,3891.917,892.727,445.945,542.044,6900.807,844.422,2034.323,669.901,1688.051,1981.601,,,
+165,6d7845d207,2026-09-30,5683,Fix deprecated json_pointer/string operator== warning in value() (#5683),1965.197,4105.789,11501.364,3157.544,3800.289,898.122,445.399,539.685,6900.433,834.541,2000.133,652.354,1670.945,1960.876,,,
+166,42f89e3130,2026-09-30,5684,Let to_json(std::optional<T>) propagate exceptions from T's to_json (#5684),2016.899,4156.430,11476.489,3216.315,3895.245,908.714,444.300,541.764,6923.422,839.459,2018.934,672.859,1689.306,1987.428,,,
+167,6218aa212b,2026-09-30,5687,Throw std::length_error for operator[](SIZE_MAX) instead of corrupting the array (#5687),1989.158,4149.156,11547.229,3193.015,3845.187,905.308,446.389,541.290,6853.266,843.028,2037.245,661.213,1681.390,1966.649,,,
+168,1151826508,2026-09-30,5691,Take diff()'s fast path unless the object type reorders members (#5691),1991.280,4147.341,11570.312,3171.182,3847.333,904.510,441.250,539.803,6885.776,836.303,2018.693,665.307,1685.990,1970.057,,,
+169,e444a66276,2026-09-30,5693,Copy values before inserting an initializer list into an array (#5693),2000.774,4175.507,11546.979,3189.357,3841.169,897.455,442.384,539.493,6839.688,836.213,2014.519,667.390,1685.418,1968.991,,,
+170,bfea6f36d3,2026-09-30,5694,Fix to_msgpack() reading the inactive number union member (#5694),1997.465,4144.279,11549.781,3224.287,3855.120,899.475,441.995,539.924,6903.776,839.550,2019.396,664.487,1688.249,1954.211,,,
+171,5b11a0282c,2026-09-30,5697,Exchange the CustomBaseClass subobject in basic_json::swap() (#5697),1987.983,4074.349,11483.114,3174.632,3841.604,893.256,438.279,535.885,6866.641,834.328,1996.396,660.828,1676.300,1936.210,,,
+172,44a88d85be,2026-09-30,5698,Fix NLOHMANN_JSON_SERIALIZE_ENUM_STRICT's from_json message (#5698),1972.237,4125.945,11373.917,3158.716,3810.039,890.097,438.075,534.577,6867.432,842.045,2028.150,664.206,1681.353,1936.231,,,
+173,bfe0f32d71,2026-09-30,5699,Fix std::terminate and null pointer access in input_stream_adapter (#5699),2014.371,4159.779,11667.416,3200.425,3876.135,911.716,448.788,543.198,6932.657,852.397,2056.197,668.764,1699.573,1984.479,,,
+174,4bb1b14b06,2026-09-30,5702,Trim the compiler-appended NUL from wide/UTF string literals too (#5702),1979.723,4105.685,11603.562,3180.932,3846.698,906.188,443.969,534.534,6837.479,840.588,2006.043,654.851,1672.289,1965.408,,,
+175,5bd766aa50,2026-09-30,5703,Move to_bson's binary subtype check into calc_bson_sizes (#5703),1999.606,4183.386,11588.646,3192.771,3844.425,900.169,446.795,541.406,6888.114,847.107,2022.637,663.480,1686.702,1974.777,,,
+176,6ae17630a4,2026-09-30,5705,"Reject integral keys for contains(), find(), and count() at compile time (#5705)",2000.405,4157.120,11551.656,3197.417,3891.646,903.558,448.544,541.553,6914.203,848.561,2042.578,663.661,1691.910,1974.341,,,
+177,7fd6895788,2026-09-30,5706,Hide a discarded container's content from the parser callback (#5706),1971.987,4075.362,11463.219,3164.909,3797.453,889.534,443.974,535.026,6857.323,835.793,2025.343,651.970,1687.670,1951.428,,,
+178,66877675b1,2026-09-30,5719,"Check the iterator range for binary values in basic_json(first, last) (#5719)",1970.369,4104.886,11534.635,3168.601,3796.291,897.271,444.655,538.917,6826.990,842.445,2016.962,650.099,1673.940,1953.693,,,
+179,2ea6d8c127,2026-09-30,5720,Require the found key to equal the looked-up key when comparing objects (#5720),2015.556,4188.886,11567.125,3251.890,3863.818,903.970,448.691,540.422,6912.255,843.774,2044.479,653.832,1676.634,1951.959,,,
+180,67435c9c7e,2026-09-30,5721,Give a deep copy its type only after its container exists (#5721),1994.257,4160.658,11600.553,3218.367,3880.128,900.769,449.260,541.607,6899.448,841.635,2043.909,666.759,1694.646,1974.861,,,
+181,6fc0d501f3,2026-09-30,5610,Move the user-defined string literals to <nlohmann/json_literals.hpp> and add JSON_NO_AUTOMATIC_UDLS (#5610),2021.715,4187.888,11647.594,3209.388,3925.060,911.591,450.961,544.303,6975.265,845.109,2049.853,670.295,1697.019,1987.428,,,
+182,fdcc569eee,2026-09-30,5692,Use only documented StringType members in json_pointer (#5692),1965.264,4147.273,11378.188,3159.364,3787.758,889.399,447.397,535.062,6809.698,835.116,2015.202,656.241,1689.072,1955.238,,,
+183,6a073dbae4,2026-09-30,5695,Give operator>> a strong exception-safety guarantee (#5695),2010.979,4211.982,11698.218,3205.401,3897.172,898.499,445.961,545.225,6898.870,847.042,2051.316,664.716,1706.401,1981.247,,,
+184,3b6ae43c53,2026-09-30,5598,Add JSON_DISABLE_TUPLE_REFERENCE_CONVERSION to fix std::tuple conversions (#5598),2025.122,4195.468,11682.199,3204.529,3924.068,904.766,448.209,544.669,7041.276,849.103,2047.488,665.592,1695.987,1984.755,,,
+185,7d7055ec50,2026-09-30,5723,Fix stack overflow converting deep values between specializations (#5723),1985.310,4117.099,11457.052,3157.591,3832.175,895.910,442.225,535.237,6864.375,833.653,2001.760,679.826,1674.819,1956.998,,,
+186,35802e78d6,2026-09-30,5735,Remove dead Makefile targets; document macro_builder; tidy serve_header (#5735),2004.498,4163.065,11590.594,3184.810,3902.229,906.494,447.394,539.542,6923.969,845.596,2044.457,666.187,1692.019,1977.030,,,
+187,c261578431,2026-09-30,5730,Deduplicate binary reader/writer helpers and fix stale comments (#5730),1968.723,4154.789,11441.718,3160.367,3870.578,889.545,443.139,535.314,6850.886,837.281,2024.650,660.842,1691.628,1978.000,,,
+188,1d675cdb46,2026-09-30,5733,Fix CI jobs that check less than they claim; move arm64 to GitHub (#5733),1995.704,4206.185,11691.125,3227.622,3966.104,909.748,449.770,541.566,6951.938,852.506,2009.592,663.701,1686.265,1983.285,,,
+189,a32f61eb98,2026-09-30,5678,Fix update() and merge_patch() when the argument is *this or one of its members (#5678),2014.810,4157.101,11636.135,3210.326,3924.659,899.344,448.133,541.371,6913.401,841.487,2038.263,667.515,1697.503,1980.686,,,
+190,18dd5663b0,2026-10-01,5548,Diff deeply nested values without recursing per nesting level (#5548),1990.931,4152.500,11469.697,3204.740,3985.593,903.248,448.981,540.974,6929.740,847.493,2040.504,665.352,1698.903,1981.438,,,
+191,3926fcaac3,2026-10-01,5729,"Deduplicate serializer dump code; fix stale includes, docs, and lint (#5729)",1999.556,4178.489,11581.000,3208.657,3876.755,891.669,452.445,538.525,6893.078,846.721,2042.010,662.154,1689.653,1975.503,,,
+192,cff0a61369,2026-10-01,5731,Share DOM SAX position handling; fix stale parser and lexer comments (#5731),2017.231,4112.604,11588.291,3157.047,3890.343,902.329,458.713,539.539,7020.568,847.995,2073.873,654.562,1696.823,1978.381,,,
+193,e400780533,2026-10-01,5745,Re-amalgamate single_include (#5745),1980.338,4100.659,11418.854,3166.896,3835.432,885.298,452.886,538.053,6888.203,824.666,2031.410,650.846,1668.952,1949.107,,,
+194,6aec1a085f,2026-10-02,5677,Report BON8 input that ends after a UTF-8 lead byte as truncated (#5677),2003.321,4099.066,11614.364,3159.029,3849.857,899.995,459.542,539.436,6904.474,843.221,2071.503,652.303,1685.702,1972.556,,,
+195,4d46bce4e1,2026-10-02,5750,Fix CI on develop (#5750),1962.685,4025.677,11277.718,3103.052,3785.213,894.610,448.583,533.887,6870.062,834.856,2020.231,658.339,1674.874,1954.242,,,
+196,63c10a51fc,2026-10-02,5638,"Review and extend the documentation, and check it in CI (#5638)",1968.954,4036.851,11425.135,3104.359,3797.852,902.519,451.067,537.668,6910.375,852.438,2043.889,674.938,1701.314,1971.711,,,
+197,6d0867a85f,2026-10-02,5751,Make comparisons with scalars noexcept only when the conversion is (#5751),2008.360,4091.453,11376.562,3144.575,3820.110,903.850,455.980,538.035,6851.885,841.549,2010.128,667.182,1690.586,1970.957,,,
+198,d11e89471b,2026-10-04,5606,Assert on missing array indices in const operator[] and document the JSON pointer case (#5606),2000.121,4075.695,11475.520,3139.456,3837.211,900.437,453.703,538.895,6921.432,845.064,2027.417,663.969,1679.148,1964.082,,,
+199,df27cc3d4c,2026-10-04,5682,Add scalar-on-left overloads for legacy discarded comparisons in C++20 (#5682),2010.838,4092.432,11495.625,3125.726,3873.167,911.281,456.807,538.386,6911.630,844.451,2033.630,688.219,1691.407,1971.697,,,
+200,6f2048cd5d,2026-10-04,5685,Accept lvalues in ordered_map::emplace's value parameter (#5685),1999.816,4095.006,11445.740,3136.685,3924.146,918.692,458.336,542.423,6968.520,848.783,2037.096,667.772,1708.274,2002.449,,,
+201,0d01d6ae90,2026-10-04,5686,Classify leaves with operator<=> itself past the nesting bound (#5686),1983.320,4116.981,11466.250,3192.969,3923.208,914.596,456.625,539.558,6975.537,849.252,2056.035,701.221,1716.493,1983.908,,,
+202,b730946432,2026-10-04,5689,Fix key types convertible to std::string_view breaking lookups (#5689),1990.288,4060.487,11377.709,3107.537,3803.857,892.191,451.727,538.045,6896.480,844.989,2018.884,658.649,1676.566,2023.638,,,
+203,49cd427196,2026-10-04,5690,"Copy-construct the base class of a deep copy's elements, not assign it (#5690)",1983.320,4033.156,11333.843,3138.547,3882.878,894.785,454.473,538.337,6918.619,841.205,2072.151,655.193,1693.871,1977.288,,,
+204,756b28c2b8,2026-10-04,5696,Keep a NUL byte ending a // comment as the end of input (#5696),1985.931,4099.331,11579.875,3148.560,3872.422,896.276,451.436,536.774,6901.156,845.631,2014.820,648.054,1685.199,1971.762,,,
+205,1edf0ef041,2026-10-04,5700,"Fix value(json_pointer, default) aborting under JSON_NOEXCEPTION (#5700)",1987.233,4076.133,11442.625,3124.099,3888.688,898.266,454.349,539.423,6950.140,852.803,2030.279,654.586,1691.751,1978.197,,,
+206,a212d3b2e4,2026-10-04,5722,Preserve the object comparator's state in a deep copy past the nesting bound (#5722),2000.138,4113.471,11391.854,3151.006,3866.904,905.695,455.384,539.504,6929.818,842.213,2029.619,674.438,1697.044,1983.856,,,
+207,1df1e8a845,2026-10-04,5591,Make cross-string-type basic_json conversion explicit without implicit conversions (#5591),2000.533,4107.994,11370.989,3160.854,3881.635,897.877,455.201,540.307,6927.167,840.130,2053.458,664.118,1697.618,1982.876,,,
+208,38a2db260c,2026-10-04,5728,Remove dead metaprogramming and duplicated code in traits and pointers (#5728),1971.450,4040.828,11319.270,3109.521,3819.505,903.606,451.137,538.725,6825.640,843.951,2016.652,663.160,1684.596,1958.896,,,
+209,c5650eaa3c,2026-10-04,5704,Reject malformed UTF-16/UTF-32 units in wide-string input (#5704),2006.689,4133.594,11469.209,3180.930,3881.633,902.924,456.572,540.557,6992.385,850.474,2025.267,652.367,1680.025,1957.468,,,
+210,40021f38fb,2026-10-04,5589,Add basic_json::as_base_class and document name conflicts with custom base classes (#5589),2012.673,4147.193,11453.250,3167.448,3892.542,910.149,457.238,541.642,6998.084,852.247,2049.759,652.868,1688.229,1972.508,,,
+211,73e9eae3c1,2026-10-04,5746,Add an error_handler parameter for UTF-8 to the binary readers and writers (#5746),2013.845,4130.237,11456.041,3135.688,3818.956,892.111,449.408,538.308,6825.213,835.872,1495.468,697.054,1679.760,1970.285,,,
+212,d8d47be4a5,2026-10-04,5754,Fix CI on develop after merging the ready-to-merge PRs (#5754),2013.191,4119.948,11573.656,3173.029,3941.703,912.201,459.208,541.264,7013.364,848.908,1514.681,699.273,1685.391,1984.652,,,
+213,6b4b825af2,2026-10-04,5607,Handle numbers that do not fit narrow number types in the binary readers (#5607),2009.190,4044.127,11362.677,3127.688,3827.841,892.131,449.386,534.731,6915.360,829.562,1487.640,697.206,1688.237,1952.157,,,
+214,8c1f60a45e,2026-10-04,5600,Store maps with enum keys as objects (opt-in) (#5600),2008.560,4128.059,11523.011,3187.763,3843.177,912.520,456.427,537.514,6859.010,839.685,1501.515,696.508,1688.848,1968.910,,,
+215,c5a7a4b46d,2026-10-04,5688,"Add deprecated from_bon8/from_bjdata(ptr, len) overloads (#5688)",2030.310,4108.505,11412.907,3141.836,3899.435,904.756,455.298,541.069,6926.151,846.240,1504.193,700.820,1693.983,1987.713,,,
+216,23d3b373e1,2026-10-04,5755,Add JSON_DELETE_DEPRECATED_FUNCTIONS to delete the deprecated functions (#5755),2018.708,4106.015,11533.729,3134.945,3826.409,899.623,452.833,538.544,6846.443,830.555,1509.060,705.724,1692.819,1971.476,,,
+217,8a142bc436,2026-10-06,5764,"Fix CI on develop after #5600, #5607, and #5755 (#5764)",2017.533,4151.854,11526.334,3195.240,3884.953,907.457,456.697,540.114,6891.136,844.145,1517.241,699.051,1690.344,1972.104,,,
+218,5379e04ce4,2026-10-06,5761,Throw type_error.321 when serializing discarded values to binary formats (#5761),1999.156,4055.300,11427.521,3153.581,3836.060,891.927,455.413,540.938,6883.093,853.094,1510.099,701.888,1686.695,1982.806,,,
+219,0a365865f9,2026-10-06,5762,Make basic_json destruction allocation-free and non-recursive (#5762),2024.289,4081.646,10719.428,3112.958,3900.503,924.900,462.081,540.765,6965.453,850.019,1511.381,669.802,1620.269,1912.078,,,
+220,5ecb704f6b,2026-10-06,5592,Speedup; check for the expected separator before the lexer's token switch (#5592),1920.428,3801.979,10139.250,2891.862,3833.159,823.859,451.951,540.310,6885.672,843.570,1512.778,668.793,1608.501,1885.206,,,
+221,6d4543e743,2026-10-06,5767,Fix destroy() for ObjectTypes without reverse iteration (#5767),1929.030,3843.266,10232.541,2911.458,3926.867,830.030,450.002,542.043,6938.890,846.589,1515.211,675.264,1622.245,1904.006,,,
+222,9b179cee1e,2026-10-06,5770,Handle all value_t enumerators in has_no_children() (#5770),1931.275,3794.497,10155.125,2891.927,3871.831,829.432,446.176,535.126,6909.625,833.114,1498.945,677.571,1615.785,1884.043,,,
+223,69874e4544,2026-10-06,5760,Fix NUL bytes in UBJSON/BJData high-precision numbers (#5760),1924.896,3853.081,10247.750,2926.515,3872.041,835.227,453.025,541.002,6919.037,842.240,1521.169,674.487,1607.441,1880.884,,,
+224,162e13b86f,2026-10-06,5758,Add with_*_t alias templates to create basic_json types with changed template parameters (#5758),1938.268,3842.126,10289.968,2914.104,3962.414,834.967,455.536,543.630,6969.266,850.082,1530.064,678.054,1635.303,1916.763,,,
+225,21a69230bd,2026-10-06,5585,Create a value before giving it its type (#5585),1918.165,3829.354,10247.656,2914.619,3874.909,832.287,451.252,543.791,6873.995,839.514,1521.088,699.604,1615.742,1894.449,,,
+226,ff6f3d7d4a,2026-10-07,5766,Reject nested indefinite-length CBOR string chunks (#5766),1926.074,3868.810,10256.823,2919.802,3957.807,832.129,457.241,543.640,7024.745,847.770,1522.612,705.623,1634.212,1918.402,,,
+227,1c754cfe31,2026-10-07,5701,Copy a pair-shaped array value under JSON_BRACE_INIT_COPY_SEMANTICS (#5701),1930.652,3828.195,10263.927,2921.570,3901.404,832.628,455.652,541.701,6909.037,843.563,1512.309,704.354,1623.254,1909.917,,,
+228,24dd7c63f0,2026-10-07,5777,Re-amalgamate after #5740 (#5777),1908.632,3833.930,10278.146,2905.443,3935.422,838.465,454.491,545.605,6905.047,839.087,1519.816,709.223,1618.643,1886.706,,,
+229,30e542e52a,2026-10-07,5776,Declare the namespace-scope constants in to_chars.hpp inline (#5776),1934.934,3823.724,10229.636,2916.698,3929.565,829.102,452.279,543.038,6951.995,837.059,1524.049,720.722,1619.823,1903.938,,,
+230,367336c83d,2026-10-07,5779,Fix CI on develop after #5585 (#5779),1928.921,3780.927,10153.395,2883.604,3877.750,824.488,451.999,543.662,6927.395,835.495,1506.387,694.058,1622.903,1907.732,,,
+231,069ace74af,2026-10-07,5707,"Round-trip BJData ND-array annotations exactly (single precision, key order) (#5707)",1937.387,3843.716,10184.302,2923.323,3936.570,827.610,456.123,543.169,6907.756,847.020,1515.229,696.202,1626.001,1901.142,,,
+232,43fe8928e1,2026-10-07,5781,Stop binary writers overflowing the stack on deep values (#5781),1961.046,3868.274,10300.573,2899.792,3982.526,845.594,461.395,543.298,7059.093,846.696,1522.728,697.717,1623.846,1921.370,,,
+233,a5f5d3059b,2026-10-07,5772,Make std::hash<basic_json> consistent with operator== for numbers (#5772),1949.220,3857.159,10170.427,2890.052,3981.349,840.234,459.334,541.947,6953.786,843.495,1509.713,703.339,1627.086,1911.653,,,
+234,a269794db7,2026-10-08,5782,Use MSVC intrinsics for full multiplication (#5782),1931.869,3817.742,10159.666,2902.820,3903.263,840.740,455.827,540.621,6884.562,843.272,1513.776,702.028,1614.459,1901.008,,,
+235,69a0c1b82c,2026-10-09,5328,Avoid allocating temporary basic_json for cbor and msgpack object keys (#5328),1909.579,3777.560,10065.682,2852.732,3897.659,833.289,459.856,540.631,6882.354,833.998,1498.288,314.059,1609.343,1906.714,,,
+236,374dfe4f0f,2026-10-09,5791,Keep converted object keys alive while writing UBJSON and BJData (#5791),1911.274,3827.188,10159.553,2886.568,3890.388,833.632,459.800,542.649,6954.547,838.507,1509.324,314.357,1613.655,1892.838,,,
+237,44e8597701,2026-10-09,5792,Flatten deeply nested values without recursing per nesting level (#5792),1940.103,3811.779,10139.396,2865.050,3874.896,835.001,459.686,544.065,6866.943,836.862,1496.298,314.617,1614.837,1891.741,,,
+238,2913e96433,2026-10-09,5793,Unflatten in time and memory linear in the pointer depth (#5793),1908.453,3785.099,10262.147,2878.961,3920.657,845.619,459.806,543.998,6874.813,832.659,1486.901,312.175,1589.620,1863.981,,,
+239,84ee12a67c,2026-10-09,5797,Make UTF8_ACCEPT/UTF8_REJECT inline variables to avoid TU-local exposure in modules (#5797),1922.691,3792.849,10162.656,2871.562,3887.719,836.308,456.522,542.577,6912.807,840.369,1497.447,313.683,1609.988,1899.591,,,
+240,1649d9eda4,2026-10-11,5783,Use and extend the detail helpers to remove duplicated code (#5783),1916.258,3804.242,10297.344,2913.118,3847.662,836.519,453.270,538.750,6953.015,832.774,1506.068,324.715,1596.974,1875.878,,,
+241,2cca04ae6f,2026-10-11,5800,Report one-character non-numeric array indices like longer ones (#5800),1932.327,3803.750,10135.438,2881.041,3894.622,840.016,458.569,538.037,6842.948,829.444,1499.722,324.811,1607.194,1875.851,,,
+242,74a03dec84,2026-10-11,5802,Throw type_error.321 for discarded values in to_bon8 (#5802),1924.695,3814.854,10084.239,2873.180,3848.498,839.406,450.575,534.181,6893.005,834.300,1503.369,324.389,1607.323,1887.871,,,
+243,e8b747e4bc,2026-10-11,5808,Re-amalgamate single_include after #5795 and #5806 (#5808),1937.995,3840.622,10221.990,2896.024,3885.568,834.394,458.874,539.771,6906.182,839.793,1517.689,324.800,1609.838,1890.885,,,
+244,40a62947d3,2026-10-12,4965,support JSON Merge Patch (RFC 7396) diff creation (#4965),1932.021,3822.188,10248.416,2924.560,3980.331,842.462,459.010,540.237,6978.526,838.941,1529.508,326.435,1636.153,1917.472,,,
+245,f23830b65e,2026-10-13,5809,Derive the lexer position lazily for seekable input (#5809),1814.075,3368.028,9974.755,2807.532,3943.229,647.639,457.018,551.206,6954.166,843.355,1522.762,315.716,1618.953,1903.816,,,
+246,aa9620fb15,2026-10-13,5810,Skip the indentation after a newline 8 bytes at a time (#5810),1719.629,2959.344,10139.771,2799.555,3939.292,592.867,465.821,545.858,6968.068,849.167,1519.774,315.385,1629.981,1907.253,,,
+247,e839bbd1c0,2026-10-13,5813,"Export client-facing headers from json.hpp for IWYU / include-cleaner, and check clients in CI (#5813)",1725.742,2949.070,10136.603,2821.591,3919.927,589.957,463.642,544.851,6987.427,843.151,1517.562,314.425,1619.671,1903.613,,,
+248,5b4c8f9b00,2026-10-14,5738,"Speed up the lexer: own float parser, string scan, and \u table (#5738)",1615.668,2934.565,8763.651,2794.503,3928.286,559.107,374.921,516.391,6937.140,815.776,1513.238,325.043,1625.226,1912.905,,,
+249,91a7a94cc6,2026-10-14,5634,"Write doubles with the shortest digits (Żmij), digits in registers (#5634)",1613.126,2929.599,8708.599,2783.954,3874.248,548.449,363.632,468.127,2421.176,745.466,1511.406,323.743,1614.195,1900.392,,,
+250,a6e9785ab6,2026-10-15,5831,Look up the key only once in the callback parser's key() (#5831),1589.309,2938.557,8798.823,2767.872,3882.154,547.301,364.257,467.833,2395.851,744.716,1506.830,316.192,1623.771,1899.458,,,
+251,0c4e7c103c,2026-10-15,5834,Make flatten() linear for ordered_json (#5834),1625.754,2936.203,8755.088,2793.081,3879.740,557.529,366.745,468.359,2418.388,746.210,1524.325,315.954,1614.677,1898.544,,,
+252,0a4b3a84ee,2026-10-15,5836,"Speed up JSON pointer parsing, formatting, comparison and lookup (#5836)",1622.914,2915.901,8819.073,2783.990,3922.758,558.429,366.216,470.019,2427.606,747.168,1526.881,316.972,1625.611,1912.601,,,
+253,6ba53e63dd,2026-10-15,5833,Speed up array-to-container from_json (#5833),1626.155,2920.747,8777.989,2782.870,3988.206,560.154,367.695,469.892,2427.262,749.301,1529.474,316.399,1631.810,1915.217,,,
+254,ca7740fef2,2026-10-15,5837,Move elements when converting rvalue containers to JSON (#5837),1615.747,2928.778,8765.792,2773.062,3926.456,561.034,367.498,469.807,2424.344,748.423,1523.215,316.339,1624.374,1894.455,,,
+255,4530d9681c,2026-10-15,5832,Fix quadratic parent updates for ordered_json with JSON_DIAGNOSTICS (#5832),1618.937,2911.378,8794.094,2763.191,3886.974,555.789,366.475,469.275,2415.231,746.755,1512.590,315.856,1618.226,1899.284,,,
+256,91869983a0,2026-10-15,5840,Make the value lifecycle inline-friendly (#5840),1595.075,2832.274,8420.390,2690.050,3876.841,555.209,366.118,469.783,2424.335,747.931,1485.914,314.048,1549.787,1775.823,,,
+257,6a27b9acb2,2026-10-15,5838,Construct remaining hot-path exceptions out of line so core functions inline (#5838),1589.535,2824.360,8466.755,2699.690,3888.990,557.917,364.879,471.601,2422.995,746.543,1498.371,314.978,1539.656,1797.752,,,
+258,4f11512641,2026-10-15,5835,"Speed up container destruction, iterator access and diff() (#5835)",1515.750,2714.756,8639.213,2574.698,3805.860,561.827,366.793,469.680,2421.769,748.727,1383.744,317.248,1446.525,1705.789,,,
+259,ed86019a21,2026-10-15,5839,Move binary reader error construction out of line (#5839),1507.907,2766.774,8597.870,2622.289,3767.638,553.026,362.644,468.482,2408.731,744.936,1362.080,324.833,1445.531,1703.216,,,
+260,6261d1e432,2026-10-15,5842,Construct the JSON Patch exceptions out of line (#5842),1532.015,2756.867,8670.677,2617.989,3869.133,558.865,365.834,469.932,2435.279,750.295,1380.628,327.010,1453.340,1705.232,,,
+261,ce28c722bc,2026-10-15,5815,Allow the same type for number_integer_t and number_unsigned_t (#5815),1533.045,2775.807,8543.755,2615.412,3776.721,553.127,365.866,471.174,2433.384,745.309,1372.372,328.405,1452.848,1716.649,,,
+262,91b9ee2602,2026-10-15,5829,Update cppcheck to 1.5.2 (Cppcheck 2.20) and fix its new findings (#5829),1516.450,2748.961,8571.521,2599.870,3807.744,557.303,367.220,472.209,2421.389,743.889,1379.405,326.087,1451.926,1710.506,,,
+263,dcb96e82fb,2026-10-15,5822,Escape characters below 0x60 from a table straight into the write buffer (#5822),1525.777,2734.963,8524.771,2588.289,3790.726,557.907,360.057,463.574,2430.626,743.382,1375.816,325.308,1439.947,1695.307,,,
+264,b41228c227,2026-10-15,5843,Fix AppVeyor failures from the Zmij double writer (#5843),1497.922,2690.614,8406.906,2582.482,3726.195,548.374,352.932,459.663,2398.953,737.639,1347.507,322.827,1429.640,1682.775,,,
+265,4da73dc5ff,2026-10-15,5858,Fix compiler warnings on develop from the API performance stack (#5858),1523.138,2731.825,8474.073,2593.149,3782.769,553.758,359.180,462.915,2380.246,739.049,1346.755,324.909,1441.408,1698.043,,,
+266,5683f5e024,2026-10-15,5859,Define less_general() only without three-way comparison (#5859),1504.689,2739.172,8603.693,2605.159,3797.057,560.213,358.865,464.429,2423.456,742.207,1374.000,326.702,1447.488,1712.379,,,
+267,cd6b428ef0,2026-10-16,5860,Fix CI failures on develop from the API performance stack (#5860),1510.160,2732.695,8564.510,2603.242,3810.518,556.015,362.409,466.047,2437.364,745.153,1377.439,325.753,1444.892,1699.255,,,
+268,cc8334113c,2026-10-19,5866,Do not use Qt's keyword macros as identifiers (#5866),1498.858,2732.644,8535.328,2587.258,3787.993,548.267,362.607,464.487,2403.147,735.633,1368.831,323.997,1442.709,1686.963,,,
+269,4da932f518,2026-10-19,5828,Make parsing from std::istream and FILE* fast (#5828),1499.289,2723.605,8397.787,2597.237,1956.330,553.182,363.501,458.898,2397.342,733.054,1362.816,320.346,1429.314,1698.294,,,
+270,122d718330,2026-10-21,5620,"Add json_document and json_view: node index, parser, and document (#5620)",1520.651,2751.099,8527.135,2588.494,1994.466,560.384,362.257,461.917,2393.611,741.198,1362.167,328.620,1441.211,1691.238,230.700,389.375,976.277
+271,43e97b629b,2026-10-21,5622,"Add element access, iteration, values, and JSON pointers to json_view (#5622)",1493.875,2687.307,8383.354,2567.078,1986.311,547.934,353.938,462.380,2400.331,737.098,1374.560,322.012,1445.504,1686.421,231.353,386.679,958.441
+272,4c3a3eb5b5,2026-10-21,5624,Add dump() and comparisons to json_view (#5624),1502.926,2714.747,8522.161,2608.565,2001.856,552.014,359.510,462.656,2393.110,732.091,1366.524,324.313,1442.119,1682.564,228.836,393.082,976.976
+273,3ff37ead75,2026-10-21,5628,Scan json_view strings with SIMD and index large objects (#5628),1514.580,2728.619,8406.562,2609.758,2041.176,556.017,357.330,462.573,2383.158,733.939,1368.057,324.391,1442.711,1700.884,177.833,367.806,950.071
+274,823eee3b59,2026-10-21,5630,"Add editable json_documents: set, push_back, insert, and erase (#5630)",1498.134,2754.810,8537.062,2588.474,1994.441,556.670,353.931,463.646,2392.987,740.023,1357.930,324.129,1441.622,1698.022,181.404,376.470,962.253
+275,4971200b54,2026-10-21,5632,Add images of json_documents: save() and load() (#5632),1494.231,2681.211,8425.834,2543.276,1984.849,548.146,354.762,460.440,2414.747,734.679,1363.841,321.349,1421.806,1670.134,177.777,368.631,949.292
+276,4155e2938f,2026-10-21,5633,Write json_view's dump() without a call or conversion per token (#5633),1500.247,2712.357,8612.193,2597.211,2012.860,558.559,359.889,462.371,2412.896,739.048,1372.456,324.070,1441.546,1697.571,180.320,371.514,954.088
+277,08d7fbb0a1,2026-10-21,5874,Read FILE* input with std::fgetc under MemorySanitizer (#5874),1543.124,2758.211,8565.730,2584.453,2046.255,558.522,358.865,464.542,2421.435,743.715,1374.005,324.687,1462.572,1700.819,180.714,372.601,965.361
+278,0cbe95ffa2,2026-10-21,5824,"Speed up writing CBOR and MessagePack, above all integer arrays (#5824)",1501.550,2706.534,8707.120,2584.807,2039.728,551.688,360.692,466.024,2397.182,742.777,1361.847,201.488,1429.223,1682.436,178.641,371.038,946.389
+279,bd5227c2ec,2026-10-21,5805,Fix silent wrong results for custom number types (#5805),1511.036,2733.325,8786.406,2588.906,2000.483,553.456,360.458,465.989,2398.381,743.338,1370.524,201.168,1444.051,1701.345,179.776,372.557,954.733
+280,e13e976801,2026-10-21,5851,Accumulate number digits while scanning them (#5851),1501.737,2667.570,7762.365,2523.289,1987.518,545.368,359.336,462.056,2407.652,739.226,1368.104,200.632,1440.390,1688.117,178.721,374.278,956.353
+281,5e13f834c1,2026-10-21,5852,Copy the text of float tokens only when a SAX handler asks for it (#5852),1512.318,2655.312,7314.354,2515.044,2019.288,547.993,362.038,463.788,2410.262,745.839,1364.898,208.969,1450.422,1713.902,179.198,371.996,968.699
+282,e9970066c5,2026-10-21,5853,"Scan strings with SSE2, SSSE3, or NEON (#5853)",1488.705,2654.404,7339.589,2551.050,2015.716,486.719,341.381,475.591,2434.369,756.973,1376.754,208.797,1449.981,1706.044,182.358,379.153,968.355
+283,fa37b952df,2026-10-21,5854,Match literals without a stack array and keep parser states in bytes (#5854),1471.894,2619.164,7285.000,2485.883,1949.380,471.534,347.785,475.287,2413.552,751.487,1374.254,207.522,1443.177,1699.611,181.643,377.971,977.268
+284,52fecc1fab,2026-10-21,5855,Move object keys into the value when parsing (#5855),1392.599,2628.688,7362.562,2485.293,1882.663,471.968,339.711,473.663,2414.903,751.376,1319.857,200.185,1448.057,1705.675,179.410,371.865,963.306
+285,6aefd8c662,2026-10-21,5878,Copy short printable-ASCII strings without starting the scanner (#5878),1399.384,2664.401,7232.557,2535.425,1922.431,470.185,320.230,418.440,2446.082,696.786,1317.889,201.955,1447.217,1701.135,180.860,376.217,968.215
+286,7c26e99ac5,2026-10-21,5879,Copy ASCII strings in the view's dump with ensure_ascii (#5879),1361.839,2610.182,7187.115,2471.708,1853.592,464.274,313.821,414.316,2388.840,687.851,1318.253,200.399,1434.986,1697.487,178.601,368.595,947.799
+287,3e031b06a5,2026-10-21,5876,"Use standard library helpers where available, with C++11 fallbacks (#5876)",1381.599,2592.122,7336.719,2499.994,1848.434,467.895,315.257,415.788,2430.769,692.250,1311.164,200.424,1444.303,1698.311,180.149,374.484,961.091
+288,9bf531436f,2026-10-21,5861,"Speed up flatten(), unflatten(), diff() and patch() (#5861)",1379.301,2613.219,7170.433,2472.628,1853.035,467.161,315.217,412.303,2406.597,683.062,1298.512,198.681,1434.089,1682.912,177.511,368.116,947.255
+289,9855db81f3,2026-10-22,5881,Silence macro-to-enum for the endianness macros (#5881),1369.150,2613.547,7209.787,2476.232,1841.347,467.780,316.011,416.187,2415.504,686.920,1304.263,200.868,1441.243,1694.603,178.739,368.123,948.579
+290,aa0b371f7c,2026-10-23,5884,"Faster std::istream input: inline get-area path, binary reads, unbuffered streambufs (#5884)",1375.030,2569.362,7218.375,2484.425,1743.476,470.240,319.245,403.750,2436.034,679.759,1319.508,201.531,1443.354,1698.057,180.133,372.206,946.488
+291,86d5c56c54,2026-10-23,5886,"Speed up flatten(), unflatten(), diff() and patch() further (#5886)",1386.169,2622.331,7281.551,2495.923,1700.794,472.317,317.282,403.416,2409.097,682.507,1320.319,200.963,1444.908,1697.678,179.138,375.751,954.573
+292,dec0e9b749,2026-10-23,5883,"Write strings, scalars and indentation in dump() with fewer calls (#5883)",1383.235,2621.847,7151.412,2491.644,1732.469,473.034,211.016,288.685,2276.953,416.068,1318.490,200.574,1452.099,1701.256,180.064,372.324,960.583
+293,6fa14d8f95,2026-10-23,5885,Write binary formats through reserved sink space and number runs (#5885),1366.956,2600.914,7176.994,2465.343,1691.333,462.351,210.662,285.259,2301.553,417.589,1324.173,136.601,1429.240,1687.947,179.319,368.881,962.518
+294,0b924f5375,2026-10-23,5887,Split and print JSON pointers in one pass (#5887),1377.526,2597.394,7242.688,2464.445,1739.841,466.382,211.716,288.202,2319.771,418.288,1318.592,138.744,1441.983,1706.639,179.684,372.087,976.078
+295,e9c4fe3cdf,2026-10-24,5889,json_view: indented and ensure_ascii dumps through the fast writer (#5889),1393.007,2627.226,7248.287,2491.551,1769.642,469.976,211.665,291.327,2305.655,420.168,1319.431,139.577,1457.965,1712.927,182.274,377.741,983.284
+296,dd7686a269,2026-10-24,5888,"json_view: faster reading, indexing and C-stream parsing (#5888)",1382.444,2607.026,7161.365,2472.635,1701.277,468.438,209.963,287.564,2276.329,415.511,1311.194,137.875,1439.700,1696.646,177.624,367.131,977.802
+297,9c50bdd140,2026-10-24,5882,Make the DOM parser cheaper per container and per member (#5882),1392.673,2461.082,6068.625,2334.706,1696.950,475.550,209.313,291.776,2300.287,416.349,1317.581,138.194,1441.209,1707.720,178.751,367.339,978.031
+298,01139dc192,2026-10-24,5905,Silence an Infer false positive in json_view materialize (#5905),1381.470,2463.013,6078.010,2335.216,1709.088,475.718,211.023,291.212,2275.302,418.098,1320.441,137.572,1443.434,1696.436,175.969,365.658,975.272
+299,fe5e401870,2026-10-25,5901,Consolidate duplicated detail helpers and bodies (#5891) (#5901),1395.881,2462.765,6066.698,2327.708,1706.745,474.184,212.683,289.321,2283.842,417.657,1314.153,138.084,1442.796,1696.588,177.144,364.092,961.847
+300,3eae5680d6,2026-10-25,5902,"from_json: number-first dispatch for arithmetic types, loop for std::array (#5902)",1397.343,2477.060,6080.864,2340.781,1711.774,481.523,213.618,289.360,2289.503,417.517,1313.541,138.271,1440.822,1695.785,178.731,367.293,983.555
+301,2a56afc714,2026-10-25,5916,Fix VS 2015 build of the DOM parser (#5882) (#5916),1373.929,2476.139,6056.797,2341.890,1749.167,482.883,215.107,290.053,2292.495,417.441,1320.640,137.868,1445.227,1702.064,177.912,367.669,984.794
+302,d6431a9104,2026-10-26,5918,Throw out_of_range.411 for JSON Patch add into a null parent (#5917) (#5918),1371.635,2445.905,6017.636,2314.178,1696.447,478.134,210.996,287.397,2278.718,414.186,1291.197,137.374,1436.212,1682.197,175.790,361.130,962.070
+303,81d66291c5,2026-10-26,5358,Create objects for pointer tokens that cannot be array indices (#5358),1382.909,2465.649,6052.114,2332.556,1711.721,479.927,213.359,289.913,2289.412,417.201,1311.695,137.572,1437.168,1696.302,177.495,367.526,963.924
+304,d5da84249f,2026-10-26,5927,"Skip CBOR tags in front of map keys, validate indefinite text chunks, fix CBOR docs (#5927)",1374.553,2476.464,6076.834,2346.075,1744.224,483.375,211.423,291.148,2287.800,420.247,1320.015,137.369,1449.068,1704.785,177.459,365.004,963.908
+305,0c3570d44a,2026-10-26,5929,Validate the UBJSON/BJData container type marker for count 0; fix UBJSON docs (#5929),1381.462,2462.578,6055.183,2329.970,1713.086,484.962,210.683,290.024,2260.371,416.895,1319.093,137.782,1453.495,1706.801,177.031,361.025,962.952
+306,dc768a7d5d,2026-10-26,5930,Fix BSON binary subtype 0x02 and check the declared document size earlier (#5930),1386.856,2463.400,6054.255,2337.105,1746.441,485.425,214.508,290.954,2314.702,418.769,1325.164,139.255,1452.125,1718.313,179.005,367.327,977.054
+307,60107eda3f,2026-10-26,5931,"Read BJData ND-arrays of float16, restrict ND-array char to 0..127, correct BJData docs (#5931)",1389.051,2464.457,6049.084,2336.727,1710.473,483.159,213.007,288.990,2285.073,417.663,1317.537,137.893,1443.301,1697.126,178.706,364.051,962.202
+308,731f1b5bfb,2026-10-26,5919,"json_view: view_mode enum instead of bool Editable, node_kind for node::kind (#5919)",1381.664,2428.529,5978.713,2333.485,1746.571,479.163,211.036,288.957,2281.592,416.990,1308.904,137.486,1447.665,1691.427,175.453,363.704,963.371
+309,4cdfa6d0f4,2026-10-26,5920,json_view: no save() and load() on big-endian targets (#5920),1390.901,2477.841,6102.474,2337.925,1777.003,485.382,214.373,290.946,2303.147,421.178,1321.976,139.942,1446.726,1704.816,179.928,367.825,976.532
+310,5a2819c940,2026-10-26,5921,json_view: one SIMD macro set with the library (#5921),1393.409,2479.841,6073.011,2350.336,1785.087,485.658,214.651,292.044,2304.448,418.026,1326.212,138.942,1468.981,1719.505,179.174,368.704,982.764
+311,e5fe4ebdd2,2026-10-26,5922,json_view: from_json() of the macros reads views directly (#5922),1384.612,2467.078,6056.328,2337.309,1742.751,482.554,213.389,289.543,2299.118,417.521,1309.673,138.237,1448.628,1704.550,177.925,365.163,984.351
+312,9e67bfa115,2026-10-26,5923,json_view: the library's std conversions read views directly (#5923),1395.103,2482.517,6066.604,2350.538,1751.603,482.504,213.399,290.185,2306.188,420.406,1317.415,138.730,1444.367,1708.720,178.016,369.111,975.875
+313,21ec9bd801,2026-10-27,5915,json_view: fewer allocations when parsing small documents (#5915),1388.282,2469.118,6066.495,2340.391,1744.901,478.745,214.934,292.970,2309.264,422.842,1323.237,138.541,1454.151,1707.314,178.058,366.514,958.110
+314,2bb2feeef4,2026-10-27,5942,"Fix the red CI on develop (json_view pointer tokens, bson, from_json tests, Infer, IWYU) (#5942)",1391.981,2468.266,6068.495,2335.707,1751.527,482.908,214.285,291.291,2300.453,417.876,1328.089,138.010,1454.934,1701.845,178.250,367.182,964.917
+315,78a0687147,2026-10-27,5940,Strong exception guarantee for operator[](json_pointer) (#5940),1379.414,2467.492,6109.136,2335.309,1723.090,480.260,216.197,292.075,2313.798,415.444,1314.530,138.314,1449.629,1698.792,177.628,364.844,965.314
+316,091c10d4a5,2026-10-28,5936,Fix self-aliasing in json_pointer::operator/= and patch_inplace (#5936),1389.195,2462.409,6052.125,2321.091,1722.944,473.064,214.421,290.952,2279.997,416.589,1315.370,138.531,1437.996,1683.844,176.596,363.105,952.473
+317,54f6b3ef06,2026-10-28,5945,json_view: source positions in materialize() with JSON_DIAGNOSTIC_POSITIONS (#5945),1417.895,2496.591,6325.787,2377.105,1737.749,478.133,213.209,293.150,2304.971,422.648,1348.357,139.793,1490.556,1735.758,178.445,368.380,990.587
+318,0115bb47b3,2026-10-30,5965,Name the source and license of adapted code in the file comments (#5965),1378.289,2456.731,6043.011,2330.780,1711.965,470.960,212.371,290.798,2298.443,419.433,1323.072,137.982,1441.316,1690.457,176.197,363.182,977.928
+319,0b91f9ddd8,2026-10-30,5926,json_view: check_utf8 skips well-formed runs with the parser's string scan (#5926),1400.777,2488.449,6137.021,2359.856,1747.026,473.449,213.226,290.736,2320.524,420.950,1325.039,139.324,1452.907,1703.426,177.699,364.500,988.981
+320,ea03d601af,2026-10-30,5890,json_view: comparison without temporaries and a faster image float check (#5890),1388.958,2477.531,6127.547,2357.032,1781.238,477.111,216.144,293.938,2340.267,424.058,1337.149,139.387,1459.923,1723.919,,,
+321,755bb16d7a,2026-10-30,5966,Fix the red CI on develop: remove the duplicate is_editable in basic_json_view (#5966),1411.867,2497.560,6085.938,2326.880,1726.740,480.376,212.294,292.134,2312.521,420.608,1325.345,138.544,1465.640,1744.928,177.785,367.385,992.034
+322,4fe670b5f4,2026-10-31,5969,json_view: decode chains of unicode escapes in a loop (#5969),1390.866,2466.769,6026.817,2328.995,1736.168,475.935,212.530,291.166,2284.708,418.661,1323.436,137.513,1495.099,1736.832,176.566,365.541,963.794
+323,9c349b1d7c,2026-10-31,5964,Write integers of 17 to 20 digits eight digits at a time in dump() (#5964),1390.500,2469.332,6079.698,2359.276,1718.121,470.647,209.615,289.143,2300.836,419.976,1331.637,138.488,1450.106,1703.483,176.731,365.394,953.483
+324,3fd3e0fdaa,2026-11-01,5908,json_view: dump and read canada.json-style floats faster (batched float decisions) (#5908),1366.359,2456.409,6058.422,2329.066,1713.347,470.784,209.895,289.318,2294.111,417.490,1319.403,138.100,1435.053,1698.647,176.006,363.191,954.196
+325,76001c6b4c,2026-11-01,5968,"BSON reader: find C-string terminators 8 bytes at a time, skip array element names (#5968)",1408.222,2488.159,6124.287,2363.039,1759.751,477.558,216.880,294.011,2317.898,420.892,1345.718,138.602,1460.432,1713.978,179.721,370.205,970.525
+326,1a018577cc,2026-11-01,5970,json_view: accept() checks the text without writing an index (#5970),1427.279,2506.345,6160.916,2368.009,1765.595,480.552,214.060,293.093,2341.368,419.303,1330.990,138.625,1463.731,1724.021,181.150,373.171,964.666
+327,162eda2574,2026-11-01,5971,json_view: skip the digits of a fraction 16 bytes at a time (SSE2) (#5971),1404.191,2474.144,6049.006,2363.726,1711.013,471.608,211.613,289.736,2290.230,418.673,1322.822,138.556,1441.219,1697.559,178.814,370.881,956.959
+328,6c3ab966d3,2026-11-01,5975,CBOR reader: read runs of scalar array elements in one loop (#5975),1385.800,2466.923,6050.480,2325.901,1725.552,474.248,210.034,289.350,2296.399,418.689,1327.626,137.722,1440.577,1698.622,178.627,367.797,953.174
+329,aecbef3949,2026-11-01,5976,Binary readers: swap the bytes of floats with a single byteswap (#5976),1393.659,2479.298,6092.110,2337.421,1718.218,472.539,211.337,289.638,2307.378,417.589,1324.038,137.341,1447.860,1701.387,179.160,369.448,956.324
+330,edf8d17601,2026-11-01,5980,MessagePack reader: read runs of scalar array elements in one loop (#5980),1422.081,2486.171,6157.302,2360.678,1733.503,477.472,211.189,289.309,2307.724,419.448,1334.857,138.914,1449.345,1721.126,180.127,369.693,967.370
+331,fb515ddc34,2026-11-01,5981,UBJSON/BJData readers: read optimized arrays of numbers in one loop (#5981),1387.633,2470.528,6067.657,2345.342,1721.303,476.141,212.198,288.466,2292.649,416.597,1324.486,139.598,1441.019,1705.957,179.190,367.903,959.677
+332,517444b504,2026-11-01,5978,accept() checks strings without copying them (#5978),1385.026,2453.809,5975.744,2322.357,1711.222,475.186,210.256,288.348,2282.444,415.256,1321.012,138.726,1434.772,1698.120,178.106,365.411,976.135
+333,9742edc294,2026-11-01,5979,"BSON writer: write to_bson(j) in one pass, with sizes written afterwards (#5979)",1418.816,2514.802,6091.854,2380.269,1772.646,474.067,211.598,290.653,2316.886,421.043,1346.324,139.213,1469.659,1754.493,180.269,372.201,982.753
+334,f022e3c59c,2026-11-01,5982,Binary readers and writers: faster UTF-8 checks of strings (#5982),1399.836,2474.703,6060.781,2341.409,1707.583,468.692,209.824,290.357,2290.034,418.739,1312.448,138.360,1458.779,1707.575,178.911,369.303,968.200
+335,ddc34f546a,2026-11-01,5974,json_view: exceptions name the path and the bytes of the value (#5974),1394.263,2489.906,6017.599,2345.632,1728.593,473.672,210.364,289.980,2306.608,420.394,1327.301,138.827,1448.846,1707.037,177.406,368.436,978.755
+336,b2674a4a2f,2026-11-01,5984,BSON reader: check array element names in place in strict mode (#5984),1392.028,2460.989,5975.355,2357.154,1726.291,472.389,209.872,289.219,2301.092,417.632,1309.441,138.779,1438.270,1709.943,177.580,366.368,973.214
+337,76dbe8f9c9,2026-11-02,6009,"Fix the red CI on develop: Visual Studio 2017 build of the BSON writer, Valgrind timeouts (#6009)",1387.812,2461.244,5975.843,2323.693,1713.572,469.489,209.863,289.058,2291.892,415.935,1306.729,138.322,1447.714,1694.220,177.698,363.994,972.289
+338,03d408aafa,2026-11-02,6003,JSON_DIAGNOSTIC_POSITIONS: comparing a value-initialized iterator throws instead of crashing (#6003),1385.014,2455.146,5981.995,2380.493,1732.039,466.575,209.272,289.474,2295.226,416.844,1301.454,138.016,1445.840,1703.494,176.691,365.416,967.929
+339,66e2eeeec0,2026-11-02,6000,Do not construct the base class when destroying a container (#6000),1403.795,2457.426,6001.495,2323.510,1718.268,471.022,210.474,288.385,2308.462,417.187,1313.263,138.770,1437.867,1705.586,179.168,363.523,966.701
+340,bdc737db6d,2026-11-02,5999,json_view: dump() without StringType::capacity() (#5999),1378.656,2452.954,6020.464,2339.908,1724.630,470.774,211.638,288.939,2303.773,418.311,1312.024,139.010,1446.709,1704.406,177.291,363.859,966.602
+341,494a74c242,2026-11-02,5996,"insert(): strong guarantee for single elements, basic guarantee for the rest (#5996)",1390.153,2478.991,6032.084,2342.171,1727.040,469.799,213.660,291.104,2307.193,419.623,1329.285,139.000,1461.294,1718.750,178.995,366.898,974.652
+342,bfe69c73c2,2026-11-02,5992,"json_view: get<T>() of a boolean throws for the exact number types, as basic_json does (#5992)",1387.497,2452.207,6023.042,2335.261,1720.938,471.966,212.162,288.851,2310.949,417.260,1315.155,137.821,1448.762,1710.153,175.990,366.239,970.052
+343,ff0bdfdef3,2026-11-02,5990,Keep the byte range in exceptions about the root value (#5990),1386.358,2469.197,6037.812,2344.775,1768.382,479.285,214.375,290.939,2329.486,421.838,1332.654,138.666,1455.905,1720.376,178.637,368.500,972.955
+344,1d69ef9ab4,2026-11-02,5997,"Raise line coverage to 99.9 %: fix the measurement, remove unreachable code, add tests (#5997)",1404.481,2456.447,6166.942,2338.226,1749.981,478.338,211.609,289.387,2304.532,419.095,1321.195,140.055,1460.574,1706.842,179.067,369.688,982.029
+345,5c4f585ac2,2026-11-02,6004,"Lexer, parser, stream adapter, SAX: remove checks that invariants make dead (#6004)",1386.586,2468.772,6188.662,2373.328,1775.098,483.139,211.476,291.250,2315.874,420.854,1321.718,138.268,1464.254,1709.146,180.316,367.994,965.010
+346,100f676b3e,2026-11-02,6012,Restore the two commits of #6005 that the stack merge dropped (fixes the build of develop) (#6012),1369.597,2437.356,6122.282,2305.291,1691.485,472.217,208.716,288.666,2291.034,416.120,1300.906,137.896,1439.300,1688.769,176.641,366.389,972.368
+347,590b622d48,2026-11-02,5991,parse(): propagate std::bad_alloc instead of crashing on a half-constructed member (#5991),1377.480,2425.219,6113.438,2306.435,1716.697,474.315,209.052,288.883,2292.776,417.291,1305.336,137.989,1453.044,1704.638,179.096,368.072,978.198
+348,6d5581c4e8,2026-11-02,6008,CBOR/MessagePack readers: leave one-element arrays to the general path (#6008),1400.456,2439.163,6140.448,2328.635,1743.039,480.725,212.470,295.268,2348.332,427.202,1340.319,139.121,1489.584,1736.380,184.949,371.567,995.731
+349,b18b6fc7e6,2026-11-02,6013,Build the parser's syntax error prefix with one concat() (#6013),1370.175,2435.337,6098.834,2320.728,1726.256,472.914,210.817,289.786,2292.841,419.186,1306.593,139.277,1481.709,1714.543,177.065,366.270,971.330
+350,07876e2292,2026-11-02,6015,json_view: a value that is not found has no bytes in its exception context (#6015),1361.297,2435.980,6080.718,2305.853,1707.733,474.621,210.382,291.568,2337.276,424.783,1329.556,139.590,1450.506,1690.804,178.472,366.370,977.807
+351,baba5db36f,2026-11-02,6016,"Fix the MSVC and GCC builds of develop (C4127, -Weffc++) (#6016)",1381.280,2440.908,6116.068,2303.611,1713.472,476.121,210.492,290.105,2319.878,420.598,1318.037,139.554,1471.388,1729.097,177.078,369.621,959.145
+352,57b898ef99,2026-11-03,5998,Replace a multibyte decimal point in dump() of a long double (#5998),1376.416,2456.476,6107.073,2325.534,1714.240,471.800,213.484,290.901,2288.426,420.062,1304.744,139.492,1441.231,1696.537,176.981,363.955,944.685
+353,efc437ef6e,2026-11-04,6002,UBJSON/BJData/MessagePack reader: reject a container count equal to SIZE_MAX (#6002),1376.138,2441.279,6136.755,2331.556,1708.185,467.554,210.231,291.606,2314.834,415.023,1321.171,138.603,1456.238,1718.533,176.858,366.713,938.783
+354,42825fba07,2026-11-04,6020,Binary writers: zero only a window ahead of the vector sink's position (#6020),1391.971,2460.961,6101.484,2312.584,1736.846,484.624,211.385,289.579,2309.943,416.103,1316.307,138.308,1464.425,1715.552,179.565,367.624,969.541
+355,1da8735154,2026-11-04,6023,Fix leak and crash when an allocation throws during parsing (#6023),1358.000,2456.832,6148.140,2333.761,1752.168,487.998,213.374,290.735,2324.377,420.402,1316.165,139.748,1460.000,1714.216,179.958,367.953,970.615
+356,e48800f09d,2026-11-04,6001,Binary reader and writer: remove checks that invariants make dead (#6001),1371.292,2434.395,6104.099,2313.769,1711.288,483.297,211.214,288.130,2308.992,416.639,1300.966,138.719,1455.595,1695.539,180.445,370.313,962.574
+357,951271127b,2026-11-07,6028,Binary readers: append strings straight from contiguous input (#6028),1381.807,2431.713,6099.235,2311.519,1694.104,464.615,207.900,288.438,2322.463,418.952,1227.851,138.811,1468.723,1706.816,177.249,369.912,975.798
+358,18138227dc,2026-11-07,6030,Scan the buffer of a FILE in bulk with glibc and the Apple C library (#6030),1379.500,2439.343,6147.771,2308.199,1689.427,482.217,213.967,290.466,2309.747,420.209,1239.525,139.367,1443.438,1731.583,180.401,364.380,975.476
+359,candidate,,,develop + open pull requests,1230.726,2155.896,5188.718,2038.886,1713.280,234.359,212.584,289.591,2313.669,425.788,1234.309,137.017,1444.999,1699.919,179.250,367.586,954.772
@@ -104,10 +104,8 @@ def ribbon(body, x0, y, cw, prefix, label=True):


 # ---------------------------------------------------------------- figure 1: parse() vs json_document
-def layout():
-    W, H, P = 840, 692, "jvl"
-    b = markers(P)
-    # --- panel A: basic_json::parse()
+def layout_tree(b, P):
+    """panel A: basic_json::parse(), y from 0 to 220"""
    b.append(text(16, 26, "basic_json::parse(): a tree, every array, object, and string in its own heap allocation", "nj-jsonview-h"))
    b.append(rect(16, 98, 60, 34, "nj-jsonview-box"))
    b.append(text(46, 120, "json", "nj-jsonview-mono", anchor="middle"))
@@ -117,7 +115,7 @@ def layout():
    rows = [('"port"', "6379", None), ('"price"', "19.9", "double: 19.90 is gone"), ('"tags"', "\u2022", None)]
    for i, (k, v, note) in enumerate(rows):
        y = 50 + i * 48
-        b.append(curve(192, 115, 226, y + 17, LINE, P, bend=0))
+        b.append(line(192, 115, 226, y + 17, LINE, P))
        b.append(rect(228, y, 180, 34, "nj-jsonview-heap"))
        b.append(text(240, y + 22, k, "nj-jsonview-mono", KEY))
        b.append(text(396, y + 22, v, "nj-jsonview-mono", NUM if i < 2 else LINE, anchor="end"))
@@ -132,8 +130,9 @@ def layout():
    b.append('<path class="nj-jsonview-sep" d="M624 %g V%g"/>' % (yt - 17, yt + 17))
    b.append(text(601, yt + 5, "json", "nj-jsonview-mono", anchor="middle"))
    b.append(text(647, yt + 5, "json", "nj-jsonview-mono", anchor="middle"))
-    b.append(curve(601, yt - 17, 706, 130, LINE, P, bend=-20))
-    b.append(curve(647, yt + 17, 706, 196, LINE, P, bend=20))
+    for x1, y1, y2 in ((601, yt - 17, 130), (647, yt + 17, 196)):
+        b.append('<path class="nj-jsonview-arr nj-jsonview-c-%s" d="M%g %g C%g %g %g %g %g %g" marker-end="url(#%s-%s)"/>'
+                 % (LINE, x1, y1, x1, y2, x1 + 40, y2, 706, y2, P, LINE))
    b.append(rect(708, 113, 126, 34, "nj-jsonview-heap"))
    b.append(text(771, 135, "std::string eu", "nj-jsonview-mono nj-jsonview-sm", STR, anchor="middle"))
    b.append(rect(708, 179, 126, 34, "nj-jsonview-heap"))
@@ -141,9 +140,10 @@ def layout():
    # legend
    b.append(rect(16, 186, 18, 14, "nj-jsonview-heap", rx=3))
    b.append(text(42, 198, "a separate heap allocation", "nj-jsonview-note"))
-    # --- panel B: json_document::parse()
-    y0 = 252
-    b.append('<path class="nj-jsonview-sep" d="M16 %g H824"/>' % (y0 - 18))
+
+
+def layout_index(b, P, y0):
+    """panel B: json_document::parse(), y from y0 - 16 to y0 + 440"""
    b.append(text(16, y0 + 10, "json_document::parse(): the source text stays where it is; one flat index of 16-byte nodes", "nj-jsonview-h"))
    b.append(text(16, y0 + 38, "source text, 54 bytes (borrowed, or owned by the document)", "nj-jsonview-note"))
    cw, rx0, ry = 14, 42, y0 + 48
@@ -185,6 +185,25 @@ def layout():
    b.append(curve(vx + 105, vy, n6x, ny + nh, STRUCT, P))
    b.append(text(30, ny + nh + 50, "integers are converted while parsing and kept in their node;", "nj-jsonview-note"))
    b.append(text(30, ny + nh + 68, "floats and strings point back into the text", "nj-jsonview-note"))
+
+
+TREE_DESC = ("The text {\"port\": 6379, \"price\": 19.90, \"tags\": [\"eu\", \"a\\\"b\"]} parsed by basic_json::parse(): "
+             "the root json value points to a std::map whose three nodes are separate heap allocations; the price is stored "
+             "as the double 19.9; the tags array is a std::vector of two json values, each pointing to its own std::string.")
+INDEX_DESC = ("The same text parsed by json_document::parse(): it keeps the 54 bytes of source text and builds a flat index of "
+              "nine 16-byte nodes in document order: object, key port, unsigned integer 6379 (the converted value is in the "
+              "node), key price, float, key tags, array, string eu, and an escaped string. Keys, the float, and the plain "
+              "string point back into the source text; the escaped string points into the document's buffer of decoded "
+              "strings. A json_view is two pointers: one to the document and one to a node, here the array.")
+
+
+def layout():
+    # both panels in one figure (features/json_view.md)
+    W, H, P = 840, 692, "jvl"
+    b = markers(P)
+    layout_tree(b, P)
+    b.append('<path class="nj-jsonview-sep" d="M16 234 H824"/>')
+    layout_index(b, P, 252)
    write("json_view_layout.svg", W, H, "fig-jvl-title",
          "The same J\u200bSON text parsed by basic_json::parse() and by json_document::parse()",
          "The text {\"port\": 6379, \"price\": 19.90, \"tags\": [\"eu\", \"a\\\"b\"]}. Top: basic_json::parse() builds a tree: "
@@ -195,6 +214,16 @@ def layout():
          "key tags, array, string eu, and an escaped string. Keys, the float, and the plain string point back into the "
          "source text; the escaped string points into the document's buffer of decoded strings. A json_view is two "
          "pointers: one to the document and one to a node, here the array.", b)
+    # each panel on its own (home/blog/how_3_13_0_got_faster.md), with their own marker ids
+    b = markers("jvlt")
+    layout_tree(b, "jvlt")
+    write("json_view_layout_tree.svg", W, 222, "fig-jvlt-title",
+          "A J\u200bSON text parsed by basic_json::parse()", TREE_DESC, b)
+    b = markers("jvli") + ['<g transform="translate(0 -236)">']
+    layout_index(b, "jvli", 252)
+    b.append('</g>')
+    write("json_view_layout_index.svg", W, H - 236, "fig-jvli-title",
+          "The same J\u200bSON text parsed by json_document::parse()", INDEX_DESC, b)


 # ---------------------------------------------------------------- figure 2: lifetimes
@@ -0,0 +1,803 @@
+"""Draws the figures of home/blog/how_3_13_0_got_faster.md as inline SVGs into docs/images/.
+
+Generated files:
+
+- perf_blog_overview.svg: speedup of 3.13.0 over 3.12.0 per workload (Google Benchmark suite)
+- perf_blog_distribution.svg: how many of the suite's benchmarks got how much faster (data/perf_suite.csv)
+- perf_blog_timeline_<workload>.svg: speedup over 3.12.0 of eight workloads at every develop commit that changed
+  json.hpp or json_view.hpp since 3.12.0, one panel each
+- perf_blog_swar.svg: the eight-byte string test on one word of input
+- perf_blog_overlap.svg: writing a short string with two overlapping 16-byte loads and stores
+- perf_blog_digits.svg: converting eight ASCII digits with three multiplications
+- perf_blog_cliffs.svg: operations that were quadratic or worse, 3.12.0 against 3.13.0 (log scale)
+- perf_blog_heldout.svg: validate on the 19 files we didn't tune on, json_document against the fastest library per
+  file (data/perf_heldout_validate.json)
+- perf_blog_usecases_<platform>.svg: libraries x use cases, time relative to the fastest fully validating library
+  (data/perf_usecases_<platform>.json); perf_blog_tables.py prints the tables of the appendix from the same data
+
+The numbers are copied from the tables of the post (the timeline from data/perf_timeline.csv, which
+`tests/benchmarks/history/history.py summarize` writes); the tables stay on the page as the accessible fallback. Update both together.
+Like the figures of charts.py, the SVGs are not images: the page includes their text with
+`--8<-- "images/<name>.svg"`, so they follow the colors and fonts of the page (`nj-charts` rules in
+docs/css/fig-charts.css, `nj-fig` rules in docs/css/brand.css). Run `python3 scripts/figures/perf_blog.py` from
+docs/mkdocs after changing data or drawing, and commit the generated files.
+"""
+import csv
+import html
+import json
+import math
+import re
+from pathlib import Path
+
+HERE = Path(__file__).resolve().parent
+OUT = HERE.parents[1] / "docs" / "images"
+MINUS = "&#8722;"
+TIMES = "&#215;"
+
+# words the abbreviation extension (includes/glossary.md) would wrap in <abbr> inside the SVG text
+GLOSSARY = re.findall(r"^\*\[([^\]]+)\]", (HERE.parents[1] / "includes" / "glossary.md").read_text(), re.M)
+ABBR = re.compile(r"(?<![\w;])(%s)(?!\w)" % "|".join(sorted(map(re.escape, GLOSSARY), key=len, reverse=True)))
+
+
+def protect(text):
+    return ABBR.sub(lambda m: m.group(1)[0] + "&#8203;" + m.group(1)[1:], text)
+
+
+def esc(s):
+    return html.escape(s, quote=True).replace("&amp;#", "&#")
+
+
+def esc_md(s):
+    """esc() for text with _ or *, which the page's Markdown pass would pair across text elements as emphasis"""
+    return esc(s).replace("_", "&#95;").replace("*", "&#42;")
+
+
+def write(name, W, H, cls, tid, title, desc, body):
+    s = ['<svg class="nj-fig nj-charts %s" viewBox="0 0 %g %g" role="img" aria-labelledby="%s %s-d" '
+         'xmlns="http://www.w3.org/2000/svg">' % (cls, W, H, tid, tid),
+         '<title id="%s">%s</title>' % (tid, esc(title)),
+         '<desc id="%s-d">%s</desc>' % (tid, esc(desc))]
+    s += body
+    s.append('</svg>')
+    text = protect("\n".join(s)) + "\n"
+    assert "\n\n" not in text  # a blank line would end the raw HTML block
+    (OUT / name).write_text(text)
+
+
+def hbar(x0, x1, y, h, r=4):
+    """Horizontal bar from the baseline x0 to x1, rounded only at the data end."""
+    if abs(x1 - x0) < 0.5:
+        return "M%g %g h0.5 v%g h-0.5 Z" % (x0, y, h)
+    r = min(r, h / 2, abs(x1 - x0))
+    s = 1 if x1 > x0 else -1
+    return ("M%g %g H%g Q%g %g %g %g V%g Q%g %g %g %g H%g Z"
+            % (x0, y, x1 - s * r, x1, y, x1, y + r, y + h - r, x1, y + h, x1 - s * r, y + h, x0))
+
+
+def fx(v):
+    """speedup factor for labels: 2 significant digits below 10, integers above"""
+    if v >= 100:
+        return "%d%s" % (round(v), TIMES)
+    if v >= 10:
+        return "%.0f%s" % (v, TIMES)
+    return "%.1f%s" % (v, TIMES) if v >= 1.995 else "%.2f%s" % (v, TIMES)
+
+
+# ---------- SWAR: one word of a string ----------
+def swar():
+    text = 'witter",'
+    W, H = 640, 312
+    L, cw, top = 40, 70, 34
+    b = []
+    b.append('<text class="fg-h" x="%g" y="20">eight input bytes, loaded as one 64-bit word (byte 0 is the lowest)</text>' % L)
+    for i, ch in enumerate(text):
+        x = L + i * cw
+        special = ch == '"'
+        b.append('<rect class="fg-cell" x="%g" y="%g" width="%g" height="40" rx="4"/>' % (x, top, cw - 6))
+        if special:
+            b.append('<rect class="nj-charts-c2" fill-opacity=".25" x="%g" y="%g" width="%g" height="40" rx="4"/>' % (x, top, cw - 6))
+        b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle">%s</text>' % (x + (cw - 6) / 2, top + 26, esc(ch)))
+        b.append('<text class="nj-charts-tick" x="%g" y="%g">0x%02X</text>' % (x + (cw - 6) / 2, top + 58, ord(ch)))
+        b.append('<text class="nj-charts-tick" x="%g" y="%g">byte %d</text>' % (x + (cw - 6) / 2, top + 74, i))
+    # result row
+    y2 = top + 112
+    b.append('<text class="fg-h" x="%g" y="%g">swar_string_special(): the high bit of each byte that needs handling</text>' % (L, y2 - 14))
+    for i, ch in enumerate(text):
+        x = L + i * cw
+        special = ch == '"'
+        b.append('<rect class="fg-cell" x="%g" y="%g" width="%g" height="34" rx="4"/>' % (x, y2, cw - 6))
+        if special:
+            b.append('<rect class="nj-charts-c2" fill-opacity=".25" x="%g" y="%g" width="%g" height="34" rx="4"/>' % (x, y2, cw - 6))
+        b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle">%s</text>'
+                 % (x + (cw - 6) / 2, y2 + 23, "0x80" if special else "0x00"))
+    # conclusion
+    y3 = y2 + 70
+    b.append('<text class="fg-code" x="%g" y="%g">count_trailing_zeros(0x0080000000000000) = 55</text>' % (L, y3))
+    b.append('<text class="fg-code" x="%g" y="%g">55 / 8 = 6: copy bytes 0 to 5 in one go, then handle the quote</text>' % (L, y3 + 26))
+    b.append('<text class="fg-note fg-note--l" x="%g" y="%g">No branch per byte: a few subtractions, ANDs and ORs per word,</text>' % (L, y3 + 56))
+    b.append('<text class="fg-note fg-note--l" x="%g" y="%g">then one count of trailing zeros.</text>' % (L, y3 + 74))
+    write("perf_blog_swar.svg", W, H, "nj-charts--swar", "nj-blog-swar",
+          "Finding the end of a run of ordinary string characters eight bytes at a time",
+          "The eight bytes w, i, t, t, e, r, quote and comma are loaded as one word. The test sets the high bit only in "
+          "byte 6, the quote. Counting trailing zero bits gives 55, divided by eight gives 6: bytes 0 to 5 are copied "
+          "at once, then the quote ends the string.", b)
+
+
+def span(b, x0, x1, y, cls, label):
+    """a bracket under the cells from x0 to x1, tinted, with a label to its right or inside"""
+    b.append('<rect class="%s" fill-opacity=".22" x="%g" y="%g" width="%g" height="22" rx="4"/>' % (cls, x0, y, x1 - x0))
+    b.append('<rect class="%s" x="%g" y="%g" width="4" height="22" rx="2"/>' % (cls, x0, y))
+    b.append('<rect class="%s" x="%g" y="%g" width="4" height="22" rx="2"/>' % (cls, x1 - 4, y))
+    b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle" style="font-size:14px">%s</text>' % ((x0 + x1) / 2, y + 16, label))
+
+
+# ---------- short strings: two overlapping 16-byte loads ----------
+def overlap():
+    text = "profile_link_color"   # a key of twitter.json, 18 bytes
+    n = len(text)
+    W = 640
+    L, cw, top = 40, 31, 34
+    X = lambda i: L + i * cw
+    b = ['<text class="fg-h" x="%g" y="20">a string of n = %d bytes: too long for one 16-byte vector, too short for a loop</text>' % (L, n)]
+    for i, ch in enumerate(text):
+        both = n - 16 <= i < 16
+        b.append('<rect class="fg-cell" x="%g" y="%g" width="%g" height="36" rx="4"/>' % (X(i), top, cw - 4))
+        if both:
+            b.append('<rect class="nj-charts-c3" fill-opacity=".3" x="%g" y="%g" width="%g" height="36" rx="4"/>' % (X(i), top, cw - 4))
+        b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle">%s</text>' % (X(i) + (cw - 4) / 2, top + 24, esc_md(ch)))
+    for i in (0, n - 16, 15, n - 1):
+        b.append('<text class="nj-charts-tick" x="%g" y="%g">%d</text>' % (X(i) + (cw - 4) / 2, top + 52, i))
+    y = top + 66
+    span(b, X(0), X(15) + cw - 4, y, "nj-charts-c1", "a = load 16 bytes at p")
+    span(b, X(n - 16), X(n - 1) + cw - 4, y + 30, "nj-charts-c2", "b = load 16 bytes at p + n " + MINUS + " 16")
+    y += 82
+    b.append('<text class="fg-note fg-note--l" x="%g" y="%g">Both loads lie inside the string, and together they cover all of it; bytes %d to 15 are in both.</text>' % (L, y, n - 16))
+    b.append('<text class="fg-note fg-note--l" x="%g" y="%g">Test a and b for a quote, a backslash, a control character or 0x7F: none, so write</text>' % (L, y + 22))
+    b.append('<text class="fg-code" x="%g" y="%g">store a at d, store b at d + n %s 16</text>' % (L, y + 52, MINUS))
+    b.append('<text class="fg-note fg-note--l" x="%g" y="%g">The second store writes bytes %d to 15 again, with the same values. For any n from 16 to 32:</text>' % (L, y + 80, n - 16))
+    b.append('<text class="fg-note fg-note--l" x="%g" y="%g">two loads, one test, two stores, no loop and no branch on the length.</text>' % (L, y + 98))
+    write("perf_blog_overlap.svg", W, y + 112, "nj-charts--swar", "nj-blog-overlap",
+          "Writing an 18-byte string with two overlapping 16-byte loads and stores",
+          "The 18 bytes of profile_link_color. Load a covers bytes 0 to 15, load b covers bytes 2 to 17, so bytes 2 to 15 "
+          "are in both. Neither contains a byte that needs escaping, so a is stored at the destination and b 2 bytes "
+          "later; the second store writes bytes 2 to 15 again with the same values. This works for any length from 16 to "
+          "32 bytes without a loop.", b)
+
+
+# ---------- eight digits at a time: three multiplications ----------
+def digits():
+    W = 600
+    L, cw, h = 40, 64, 34
+    X = lambda i: L + i * cw
+    steps = [
+        ("eight ASCII digits in one 64-bit word (byte 0 is the lowest)", 1, list("12345678"), True),
+        ("& 0x0F0F0F0F0F0F0F0F: one digit value per byte", 1, list("12345678"), False),
+        ("× (10 · 2⁸ + 1) >> 8, every second byte kept: two digits per 16 bits", 2, ["12", "34", "56", "78"], False),
+        ("× (100 · 2¹⁶ + 1) >> 16, every second lane kept: four digits per 32 bits", 4, ["1234", "5678"], False),
+        ("× (10000 · 2³² + 1) >> 32: the value", 8, ["12345678"], False),
+    ]
+    b = []
+    y = 20
+    for k, (head, width, cells, ascii_) in enumerate(steps):
+        b.append('<text class="fg-h" x="%g" y="%g">%s</text>' % (L, y, esc(head)))
+        for j, c in enumerate(cells):
+            x = X(j * width)
+            b.append('<rect class="fg-cell" x="%g" y="%g" width="%g" height="%g" rx="4"/>' % (x, y + 10, width * cw - 6, h))
+            if k == len(steps) - 1:
+                b.append('<rect class="nj-charts-c1" fill-opacity=".25" x="%g" y="%g" width="%g" height="%g" rx="4"/>' % (x, y + 10, width * cw - 6, h))
+            b.append('<text class="fg-code" x="%g" y="%g" text-anchor="middle">%s</text>' % (x + (width * cw - 6) / 2, y + 10 + 23, esc(c)))
+            if ascii_:
+                b.append('<text class="nj-charts-tick" x="%g" y="%g">0x%02X</text>' % (x + (width * cw - 6) / 2, y + h + 26, ord(c)))
+        y += h + (58 if ascii_ else 40)
+    b.append('<text class="fg-note fg-note--l" x="%g" y="%g">Each step combines neighboring lanes, in all lanes of the word at once:</text>' % (L, y - 8))
+    b.append('<text class="fg-note fg-note--l" x="%g" y="%g">three multiplications instead of eight, and no branch.</text>' % (L, y + 10))
+    write("perf_blog_digits.svg", W, y + 22, "nj-charts--swar", "nj-blog-digits",
+          "Converting eight ASCII digits to their value with three multiplications",
+          "The text 12345678 as one word. Masking gives the digit values 1 to 8, one per byte. Multiplying by 10 times 2 to "
+          "the 8 plus 1 and shifting gives 12, 34, 56 and 78 in 16-bit lanes; multiplying by 100 times 2 to the 16 plus 1 "
+          "gives 1234 and 5678 in 32-bit lanes; multiplying by 10000 times 2 to the 32 plus 1 gives 12345678.", b)
+
+
+# ---------- overview: speedup per workload (Google Benchmark rows, 3.12.0 time / 3.13.0 time) ----------
+# (group, label, speedup), copied from the table "The short version"
+OVERVIEW = [
+    ("Parsing", "twitter.json", 3.49),
+    ("Parsing", "citm_catalog.json", 5.11),
+    ("Parsing", "canada.json", 4.08),
+    ("Parsing", "canada.json, indented", 7.41),
+    ("Parsing", "citm, ordered_json", 8.18),
+    ("Parsing", "twitter, std::ifstream", 2.46),
+    ("Parsing", "citm, FILE*", 14.94),
+    ("Parsing", "citm, accept()", 13.66),
+    ("Writing", "dump() twitter", 6.60),
+    ("Writing", "dump() canada", 2.90),
+    ("Writing", "dump(4) citm", 4.62),
+    ("Writing", "to_cbor() twitter", 4.41),
+    ("Reading CBOR", "twitter, memory", 3.52),
+    ("Reading CBOR", "twitter, FILE*", 9.23),
+    ("Values", "diff() canada", 10.44),
+    ("Values", "iterate canada", 1.96),
+    ("Values", "copy + destroy citm", 1.11),
+    ("Values", "== citm", 1.01),
+]
+
+
+def overview():
+    W, L, R = 560, 190, 520
+    hi = max(v for _, _, v in OVERVIEW)
+    hi = math.ceil(hi + 0.5)
+    X = lambda v: L + v / hi * (R - L)
+    pitch, bh, top = 24, 15, 8
+    b, desc = [], []
+    y = top
+    group = None
+    rows = []
+    for g, label, v in OVERVIEW:
+        if g != group:
+            if group is not None:
+                y += 10
+            b.append('<text class="nj-charts-panel" x="%g" y="%g">%s</text>' % (8, y + 12, esc(g)))
+            y += 22
+            group = g
+        rows.append((label, v, y))
+        y += pitch
+    axis_y = y + 2
+    for t in range(1, hi + 1):
+        b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(t), top, X(t), axis_y))
+        b.append('<text class="nj-charts-tick" x="%g" y="%g">%d%s</text>' % (X(t), axis_y + 16, t, TIMES))
+    for label, v, yy in rows:
+        b.append('<text class="nj-charts-rowlabel nj-charts-tick--r" x="%g" y="%g" text-anchor="end">%s</text>' % (L - 8, yy + bh - 3, esc(label)))
+        b.append('<path class="nj-charts-c1" d="%s"><title>%s: %s</title></path>' % (hbar(X(0), X(v), yy, bh), esc(label), fx(v)))
+        b.append('<text class="nj-charts-val" x="%g" y="%g">%s</text>' % (X(v) + 5, yy + bh - 3, fx(v)))
+        desc.append("%s %s" % (label, fx(v).replace(TIMES, "x")))
+    b.append('<line class="nj-charts-ref" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(1), top, X(1), axis_y))
+    b.append('<line class="nj-charts-zero" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(0), top, X(0), axis_y))
+    b.append('<text class="nj-charts-tick" x="%g" y="%g">speedup over 3.12.0 (3.12.0 = 1%s), more is better</text>'
+             % ((L + R) / 2, axis_y + 34, TIMES))
+    write("perf_blog_overview.svg", W, axis_y + 44, "nj-charts--blog", "nj-blog-overview",
+          "Speedup of 3.13.0 over 3.12.0 per workload, Apple M1 Max, Apple clang",
+          "Horizontal bars of the speedup, more is better. " + "; ".join(desc) + ".", b)
+
+
+# ---------- distribution: how many of the suite's benchmarks got how much faster ----------
+# bins of the speedup (3.12.0 time / 3.13.0 time) over all rows of data/perf_suite.csv
+BINS = [(0, 1, "below 1" + TIMES), (1, 1.5, "1 to 1.5" + TIMES), (1.5, 2, "1.5 to 2" + TIMES),
+        (2, 3, "2 to 3" + TIMES), (3, 5, "3 to 5" + TIMES), (5, 10, "5 to 10" + TIMES), (10, 1e9, "10" + TIMES + " or more")]
+
+
+def distribution():
+    rows = list(csv.DictReader((HERE / "data" / "perf_suite.csv").open()))
+    s = sorted(float(r["speedup"]) for r in rows)
+    n = len(s)
+    counts = [sum(lo <= v < hi for v in s) for lo, hi, _ in BINS]
+    geo = math.exp(sum(math.log(v) for v in s) / n)
+    med = (s[(n - 1) // 2] + s[n // 2]) / 2
+    W, H = 560, 250
+    L, R, T, B = 52, 548, 16, 196
+    hi = 10 * math.ceil(max(counts) / 10 + 0.4)
+    Y = lambda c: B - c / hi * (B - T)
+    slot = (R - L) / len(BINS)
+    b, desc = [], []
+    for t in range(0, hi + 1, 20):
+        b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (L, Y(t), R, Y(t)))
+        b.append('<text class="nj-charts-tick nj-charts-tick--r" x="%g" y="%g">%d</text>' % (L - 6, Y(t) + 4, t))
+    for k, ((lo, _, label), c) in enumerate(zip(BINS, counts)):
+        x = L + k * slot + 8
+        w = slot - 16
+        cls = "nj-charts-c2" if lo < 1 else "nj-charts-c1"
+        b.append('<rect class="%s" x="%.1f" y="%.1f" width="%.1f" height="%.1f" rx="3"><title>%s: %d</title></rect>'
+                 % (cls, x, Y(c), w, B - Y(c), label, c))
+        b.append('<text class="nj-charts-val" x="%.1f" y="%.1f" text-anchor="middle">%d</text>' % (x + w / 2, Y(c) - 5, c))
+        b.append('<text class="nj-charts-tick" x="%.1f" y="%.1f">%s</text>' % (x + w / 2, B + 16, label))
+        desc.append("%s: %d" % (label.replace(TIMES, "x"), c))
+    b.append('<line class="nj-charts-axis" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (L, B, R, B))
+    b.append('<text class="nj-charts-tick" x="%g" y="%g">speedup over 3.12.0, more is better</text>' % ((L + R) / 2, H - 10))
+    b.append('<text class="nj-charts-tick" transform="rotate(-90)" x="%g" y="14">number of benchmarks</text>' % (-(T + B) / 2))
+    print("distribution: median %s, geometric mean %s" % (fx(med), fx(geo)))
+    write("perf_blog_distribution.svg", W, H, "nj-charts--blog", "nj-blog-dist",
+          "Speedup of 3.13.0 over 3.12.0 for all %d benchmarks of the suite" % n,
+          "Bars counting the benchmarks per speedup range: " + "; ".join(desc)
+          + ". Median %s, geometric mean %s." % (fx(med).replace(TIMES, "x"), fx(geo).replace(TIMES, "x")), b)
+
+
+# ---------- timeline: one panel per workload ----------
+# (column in perf_timeline.csv, panel title, [(PR, label)]): each labeled step shows the number of the theme that
+# explains it ("U" for the UTF-8 check of the binary readers that came and went); the appendix maps steps to PRs
+TIMELINE = [
+    ("parse_citm", "parse() citm_catalog.json", [(5234, "4"), (5283, "1"), (5592, "4"), (5809, "4"), (5810, "2"), (5882, "4"), (6031, "1")]),
+    ("parse_canada", "parse() canada.json", [(5234, "4"), (5283, "1"), (5617, "3"), (5738, "3"), (5851, "3"), (5882, "4"), (6031, "1")]),
+    ("accept_twitter", "accept() twitter.json", [(5234, "4"), (5283, "1"), (5592, "4"), (5809, "4"), (5810, "2"), (5853, "2"), (6031, "1")]),
+    ("parse_twitter_ifstream", "parse() twitter.json, std::ifstream", [(5828, "1"), (5884, "1")]),
+    ("dump_twitter", "dump() twitter.json", [(5285, "6"), (5738, "2"), (5878, "2"), (5883, "2")]),
+    ("dump_canada", "dump() canada.json", [(5285, "6"), (5634, "3")]),
+    ("from_cbor_twitter", "from_cbor() twitter", [(5233, "1"), (5501, "4"), (5185, "U"), (5746, "U"), (6028, "4")]),
+    ("to_cbor_twitter", "to_cbor() twitter", [(5328, "4"), (5824, "6"), (5885, "6")]),
+]
+# pull requests that were not merged yet when the timeline was measured: their step is the last point, the candidate
+# (develop with the open pull requests merged); drop a number here once its pull request is on develop
+PENDING = {6031}
+MONTHS = [("2025-04", "3.12.0"), ("2026-09", "Sep 2026"), ("2026-10", "Oct"), ("2026-11", "Nov")]
+
+
+def timeline():
+    rows = list(csv.DictReader((HERE / "data" / "perf_timeline.csv").open()))
+    n = len(rows)
+    W, H = 340, 270
+    L, R, T, B = 44, 330, 66, 208
+    for col, title, labels in TIMELINE:
+        vals = [float(r[col]) if r[col] else None for r in rows]
+        base = vals[0]
+        rel = [base / v if v else None for v in vals]   # speedup over 3.12.0
+        hi = max(x for x in rel if x)
+        top = 2 ** math.ceil(math.log2(hi * 1.3))
+        Y = lambda s: B - math.log2(s) / math.log2(top) * (B - T)
+        X = lambda i: L + i / (n - 1) * (R - L)
+        b = ['<text class="nj-charts-panel" x="%g" y="18">%s</text>' % (8, esc(title))]
+        t = 1
+        while t <= top:
+            b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (L, Y(t), R, Y(t)))
+            b.append('<text class="nj-charts-tick nj-charts-tick--r" x="%g" y="%g">%d%s</text>' % (L - 6, Y(t) + 4, t, TIMES))
+            t *= 2
+        # month ticks: first commit of the month
+        seen = set()
+        for i, r in enumerate(rows):
+            m = r["date"][:7]
+            for key, name in MONTHS:
+                if m == key and key not in seen:
+                    seen.add(key)
+                    b.append('<line class="nj-charts-axis" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(i), B, X(i), B + 4))
+                    b.append('<text class="nj-charts-tick" x="%g" y="%g">%s</text>' % (X(i), B + 17, name))
+        # a step line: each commit's value holds until the next commit
+        pts, prev = [], None
+        for i, s in enumerate(rel):
+            if s is None:
+                continue
+            if prev is not None:
+                pts.append("%.1f,%.1f" % (X(i), Y(prev)))
+            pts.append("%.1f,%.1f" % (X(i), Y(s)))
+            prev = s
+        b.append('<polyline class="nj-charts-json" points="%s"/>' % " ".join(pts))
+        # labels for named steps: a dot at the commit and its PR number above it; PRs a few commits apart share a
+        # label, and a label that would overlap one already placed moves up
+        groups = []
+        for pr, lab in labels:
+            i = next((k for k, r in enumerate(rows) if r["pr"] == str(pr)), None)
+            if i is None and pr in PENDING and rows[-1]["commit"] == "candidate":
+                i = n - 1
+            assert i is not None, "no commit of #%d in the timeline" % pr
+            if groups and X(i) - X(groups[-1][-1][1]) < 6:
+                groups[-1].append((pr, i, lab))
+            else:
+                groups.append([(pr, i, lab)])
+        # labels in two rows above the plot, each with a guide down to its dot
+        placed = []
+        for g in groups:
+            i = g[-1][1]
+            x, y = X(i), Y(rel[i])
+            for pr, k, lab in g:
+                b.append('<circle class="nj-charts-json-dot" cx="%.1f" cy="%.1f" r="3.5"><title>#%s: %s</title></circle>'
+                         % (X(k), Y(rel[k]), pr, fx(rel[k])))
+            marks = list(dict.fromkeys(lab for _, _, lab in g))
+            w = 18 * len(marks) - 3
+            tx = min(max(x, L + w / 2), R - w / 2)
+            row = 0
+            while any(r == row and abs(tx - px) < (w + pw) / 2 + 4 for px, r, pw in placed):
+                row += 1
+            placed.append((tx, row, w))
+            ty = 46 - 18 * row   # the center of the badges
+            b.append('<line class="nj-charts-grid" stroke-dasharray="2 2" x1="%.1f" y1="%.1f" x2="%.1f" y2="%.1f"/>' % (x, ty + 8, x, y - 5))
+            for k, mark in enumerate(marks):
+                cx = tx - w / 2 + 7.5 + 18 * k
+                b.append('<circle class="nj-theme-dot%s" cx="%.1f" cy="%.1f" r="7.5"/>' % ("" if mark.isdigit() else " nj-theme-dot--other", cx, ty))
+                b.append('<text class="nj-theme-num" x="%.1f" y="%.1f" text-anchor="middle">%s</text>' % (cx, ty + 4, mark))
+        b.append('<line class="nj-charts-axis" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (L, B, R, B))
+        b.append('<text class="nj-charts-note" x="%g" y="%g">speedup over 3.12.0 (log scale), more is better</text>' % (8, H - 8))
+        final = rel[-1]
+        desc = ("%s: speedup over 3.12.0 at each of %d commits, ending at %s. Labeled steps, by theme: %s."
+                % (title, n, fx(final).replace(TIMES, "x"), ", ".join(lab for _, lab in labels)))
+        write("perf_blog_timeline_%s.svg" % col, W, H, "nj-charts--timeline", "nj-blog-tl-" + col,
+              "%s: speedup over 3.12.0 by commit" % title, desc, b)
+
+
+# ---------- cliffs: 3.12.0 and 3.13.0 times on a log axis ----------
+# (operation, 3.12.0 ms, 3.13.0 ms), copied from the table in "Fix the algorithm first"
+CLIFFS = [
+    ("diff() 64k numbers vs []", 4237, 10.8),
+    ("diff() 20k objects vs half", 122, 4.13),
+    ("parse() callback, 32k objects", 1398, 12.1),
+    ("operator< nested 24 deep", 64.4, 0.002),
+    ("operator< citm, 10x", 284, 3.94),
+    ("flatten() citm, ordered_json", 271, 1.45),
+    ("to_bson() 200 deep, 100x", 20.3, 0.352),
+    ("push_back() 100k, diagnostics", 1589, 5.32),
+    ("at(i) 10k, diagnostics", 45.9, 0.088),
+]
+
+
+def cliffs():
+    W, L, R = 600, 250, 585
+    lo, hi = -3, 4   # 1 µs .. 10 s, in log10 ms
+    X = lambda ms: L + (math.log10(ms) - lo) / (hi - lo) * (R - L)
+    top, pitch = 40, 34
+    b, desc = [], []
+    axis_y = top + pitch * len(CLIFFS) - 10
+    for e in range(lo, hi + 1):
+        b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(10 ** e), top - 10, X(10 ** e), axis_y))
+        lab = {-3: "1 µs", -2: "10 µs", -1: "0.1 ms", 0: "1 ms", 1: "10 ms", 2: "0.1 s", 3: "1 s", 4: "10 s"}[e]
+        b.append('<text class="nj-charts-tick" x="%g" y="%g">%s</text>' % (X(10 ** e), axis_y + 16, lab))
+    b.append('<text class="nj-charts-tick" x="%g" y="%g">runtime (log scale), less is better</text>' % ((L + R) / 2, axis_y + 34))
+    b.append('<defs><marker id="nj-blog-cliffs-head" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="5" markerHeight="5" '
+             'orient="auto"><path class="nj-charts-head" d="M0 0 L10 5 L0 10 z"/></marker></defs>')
+    b.append('<circle class="nj-charts-ojson-dot" cx="%g" cy="14" r="5"/><text class="nj-charts-leg" x="%g" y="18.5">3.12.0</text>' % (L, L + 10))
+    b.append('<circle class="nj-charts-json-dot" cx="%g" cy="14" r="5"/><text class="nj-charts-leg" x="%g" y="18.5">3.13.0</text>' % (L + 80, L + 90))
+    for i, (op, old, new) in enumerate(CLIFFS):
+        y = top + i * pitch + 8
+        b.append('<text class="nj-charts-rowlabel" x="%g" y="%g" text-anchor="end">%s</text>' % (L - 10, y + 4, esc(op)))
+        # an arrow from the old time to the new one, ending just before the new dot
+        b.append('<line class="nj-charts-axis" x1="%g" y1="%g" x2="%g" y2="%g" marker-end="url(#nj-blog-cliffs-head)"/>'
+                 % (X(old) - 6, y, X(new) + 7, y))
+        b.append('<circle class="nj-charts-ojson-dot" cx="%g" cy="%g" r="5"><title>%s, 3.12.0: %g ms</title></circle>' % (X(old), y, esc(op), old))
+        b.append('<circle class="nj-charts-json-dot" cx="%g" cy="%g" r="5"><title>%s, 3.13.0: %g ms</title></circle>' % (X(new), y, esc(op), new))
+        b.append('<text class="nj-charts-factor" x="%g" y="%g">%s</text>' % ((X(old) + X(new)) / 2, y - 7, fx(old / new)))
+        desc.append("%s: %g ms to %g ms" % (op, old, new))
+    write("perf_blog_cliffs.svg", W, axis_y + 44, "nj-charts--blog", "nj-blog-cliffs",
+          "Operations that grew quadratically or worse: time with 3.12.0 and 3.13.0, log scale",
+          "Dot plot on a logarithmic time axis, less is better; an arrow leads from each 3.12.0 time to the 3.13.0 time. " + "; ".join(desc) + ".", b)
+
+
+# ---------- validating the files we didn't tune on, file by file ----------
+# data/perf_heldout_validate.json: per platform, file and library the fastest fully validating way of the validate
+# use case on the 19 other files of simdjson's jsonexamples (reused parsers not chosen), extracted from
+# summarize.py --json of the held-out run
+HELDOUT = [("mac", "Apple M1 Max", "nj-charts-json-dot"), ("x86-gcc", "x86-64, GCC 16.2", "nj-charts-ojson-dot")]
+
+
+def heldout():
+    data = json.load((HERE / "data" / "perf_heldout_validate.json").open())
+    files = sorted(data["mac"])
+    rel, winner = {}, {}
+    for plat, _, _ in HELDOUT:
+        for f in files:
+            libs = data[plat][f]
+            # the fastest other library: below 1 json_document is the fastest, and the distance shows by how much
+            # json::accept() is nlohmann/json too, not another library
+            best = min((l for l in libs if l not in ("nlohmann json_document", "nlohmann json")), key=lambda l: libs[l]["us"])
+            rel[plat, f] = libs["nlohmann json_document"]["us"] / libs[best]["us"]
+            winner[plat, f] = UC_LIBS.get(best, best)
+    files.sort(key=lambda f: (rel["x86-gcc", f], rel["mac", f]))
+    W, L, R = 620, 262, 486
+    lo, hi = 0.4, 1.15
+    X = lambda r: L + (r - lo) / (hi - lo) * (R - L)
+    top, pitch = 58, 20
+    axis_y = top + pitch * len(files)
+    b, desc = [], []
+    for t in (0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1):
+        b.append('<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(t), top - 8, X(t), axis_y))
+        b.append('<text class="nj-charts-tick" x="%g" y="%g">%.1f%s</text>' % (X(t), axis_y + 16, t, TIMES))
+    b.append('<text class="nj-charts-tick" x="%g" y="%g">json&#95;document&#8217;s time / the fastest other library&#8217;s, less is better</text>' % ((L + R) / 2, axis_y + 34))
+    x = 8
+    for plat, name, cls in HELDOUT:
+        b.append('<circle class="%s" cx="%g" cy="14" r="5"/><text class="nj-charts-leg" x="%g" y="18.5">%s</text>' % (cls, x + 5, x + 15, esc_md(name)))
+        x += 30 + 7.6 * len(name)
+    b.append('<text class="nj-charts-tick nj-charts-tick--l" x="%g" y="%g">next on x86-64</text>' % (R + 14, top - 10))
+    for i, f in enumerate(files):
+        y = top + i * pitch + 6
+        b.append('<text class="nj-charts-rowlabel nj-charts-code" x="%g" y="%g" text-anchor="end">%s</text>' % (L - 10, y + 4, esc_md(f)))
+        for k, (plat, name, cls) in enumerate(HELDOUT):
+            r = rel[plat, f]
+            b.append('<circle class="%s" cx="%.1f" cy="%g" r="4.5"><title>%s, %s: %.2f%s the time of %s</title></circle>'
+                     % (cls, X(max(lo, min(r, hi))), y - 3.5 + 7 * k, esc_md(f), esc_md(name), r, TIMES, esc_md(winner[plat, f])))
+        w = winner["x86-gcc", f]
+        b.append('<text class="nj-charts-tick nj-charts-tick--l%s" x="%g" y="%g">%s</text>'
+                 % (" nj-charts-best" if rel["x86-gcc", f] > 1.0005 else "", R + 14, y + 4, esc_md(w)))
+        desc.append("%s: Mac %.2f, x86-64 %.2f (%s)" % (f, rel["mac", f], rel["x86-gcc", f], w))
+    b.append('<line class="nj-charts-ref" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(1), top - 8, X(1), axis_y))
+    b.append('<text class="nj-charts-tick" x="%g" y="%g">as fast as the next</text>' % (X(1), top - 14))
+    wins = {p: sum(rel[p, f] < 1 for f in files) for p, _, _ in HELDOUT}
+    print("heldout: json_document fastest on %s" % wins)
+    write("perf_blog_heldout.svg", W, axis_y + 44, "nj-charts--blog", "nj-blog-heldout",
+          "Validating 19 files 3.13.0 was not tuned on: json_document's time relative to the fastest other library per file",
+          "Dot plot per file, less is better; below 1.0 json_document is the fastest fully validating library. "
+          + "; ".join(desc) + ".", b)
+
+
+# ---------- the price: compile time of two programs against 3.12.0 ----------
+# CPU time of the compiler in ms, median of 5 interleaved rounds, C++20, M1 Max (the post's appendix G)
+# (3.12.0, 3.13.0, 3.13.0 with a precompiled header, 3.13.0 as a module)
+PRICE = [
+    ("Apple clang 21, -O0 (debug)", [("count_numbers", 830.8, 1131.1, 639.0, 790.3), ("server_config", 962.8, 1312.5, 774.2, 1036.5)]),
+    ("Apple clang 21, -O2", [("count_numbers", 1328.4, 1898.4, 1311.8, 1491.2), ("server_config", 1584.1, 2251.0, 1778.7, 1925.9)]),
+    ("GCC 16, -O0 (debug)", [("count_numbers", 1416.5, 2385.4, 1592.9, 1603.7), ("server_config", 1877.6, 2819.8, 2152.1, 2180.2)]),
+    ("GCC 16, -O2", [("count_numbers", 2159.0, 3464.5, 2765.0, 2739.8), ("server_config", 2877.9, 4388.2, 3722.4, 3773.8)]),
+]
+PRICE_SERIES = [("3.13.0", "nj-charts-c2"), ("3.13.0, precompiled header", "nj-charts-c1"), ("3.13.0, module", "nj-charts-c3")]
+
+
+def price():
+    W, L, R = 600, 150, 560
+    lo, hi = -50, 70
+    X = lambda pct: L + (pct - lo) / (hi - lo) * (R - L)
+    pct = lambda new, old: round((new / old - 1) * 100)
+    lab = lambda p: (MINUS + "%d%%" % -p) if p < 0 else "+%d%%" % p
+    bh, pitch, gap = 11, 14, 10
+    b, desc = [], []
+    # the key above the plot
+    x = 8
+    for name, cls in PRICE_SERIES:
+        b.append('<rect class="%s" x="%g" y="6" width="12" height="12" rx="3"/>' % (cls, x))
+        b.append('<text class="nj-charts-leg" x="%g" y="16.5">%s</text>' % (x + 18, esc(name)))
+        x += 18 + 8.2 * len(name) + 22
+    top = 54
+    b.append('<text class="nj-charts-tick" x="%g" y="%g">as fast as 3.12.0</text>' % (X(0), top - 8))
+    y = top
+    for build, progs in PRICE:
+        b.append('<text class="nj-charts-panel" x="8" y="%g">%s</text>' % (y + 14, esc(build)))
+        y += 24
+        y0, at = y, len(b)
+        for prog, old, *new in progs:
+            b.append('<text class="nj-charts-rowlabel nj-charts-code" x="%g" y="%g" text-anchor="end">%s</text>'
+                     % (L - 8, y + 1.5 * pitch + 2, prog))
+            for (name, cls), t in zip(PRICE_SERIES, new):
+                p = pct(t, old)
+                b.append('<path class="%s" d="%s"><title>%s, %s, %s: %s ms against %s ms with 3.12.0 (%s)</title></path>'
+                         % (cls, hbar(X(0), X(p), y, bh), prog, esc(build), esc(name), format(round(t), ","), format(round(old), ","), lab(p)))
+                if p < 0:
+                    b.append('<text class="nj-charts-val" x="%g" y="%g" text-anchor="end">%s</text>' % (X(p) - 5, y + bh - 1.5, lab(p)))
+                else:
+                    b.append('<text class="nj-charts-val" x="%g" y="%g">%s</text>' % (X(p) + 5, y + bh - 1.5, lab(p)))
+                desc.append("%s, %s, %s: %s" % (build, prog, name, lab(p).replace(MINUS, "-")))
+                y += pitch
+            y += gap - (pitch - bh)
+        # the grid behind this panel's bars only, so that it doesn't cross the panel titles
+        b[at:at] = ['<line class="nj-charts-grid" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(t), y0 - 4, X(t), y - gap + 4)
+                    for t in range(lo + 10, hi + 1, 20) if t]
+        y += 8
+    axis_y = y
+    b.append('<line class="nj-charts-ref" x1="%g" y1="%g" x2="%g" y2="%g"/>' % (X(0), top - 2, X(0), axis_y))
+    for t in range(lo + 10, hi + 1, 20):
+        b.append('<text class="nj-charts-tick" x="%g" y="%g">%s</text>' % (X(t), axis_y + 16, "0" if t == 0 else lab(t)))
+    b.append('<text class="nj-charts-tick" x="%g" y="%g">compile time compared with 3.12.0, less is better</text>' % ((L + R) / 2, axis_y + 34))
+    write("perf_blog_price.svg", W, axis_y + 44, "nj-charts--blog", "nj-blog-price",
+          "Compile time of two programs with 3.13.0, alone, with a precompiled header and as a module, compared with 3.12.0",
+          "Horizontal bars of the change in compile time against 3.12.0, less is better. " + "; ".join(desc) + ".", b)
+
+
+# ---------- use cases: libraries x use cases, relative time ----------
+# data/perf_usecases_<platform>.json is written by tests/benchmarks/json_view/others/summarize.py --json
+UC_FILES = ["twitter", "citm_catalog", "canada", "jeopardy"]
+USE_CASES = [("validate", "validate"), ("sum", "sum"), ("select", "select"),
+             ("edit", "edit"), ("minify", "minify"), ("write", "write")]
+UC_LIBS = {   # library in the JSON -> row label
+    "nlohmann json_document": "nlohmann/json json_document", "nlohmann json": "nlohmann/json json",
+    "yyjson": "yyjson", "simdjson": "simdjson", "sonic-cpp": "sonic-cpp", "Glaze": "Glaze", "Boost.JSON": "Boost.JSON",
+    "RapidJSON": "RapidJSON", "sonic-rs": "sonic-rs (Rust)", "simd-json": "simd-json (Rust)", "serde_json": "serde_json (Rust)",
+}
+UC_PLATFORMS = [("mac", "Use cases: time of each library relative to the fastest, Apple M1 Max"),
+                ("x86-gcc", "Use cases: time of each library relative to the fastest, x86-64 with GCC 16.2"),
+                ("x86-gcc13", "Use cases: time of each library relative to the fastest, x86-64 with GCC 13"),
+                ("x86-clang", "Use cases: time of each library relative to the fastest, x86-64 with Clang 23")]
+LEVEL_MARK = {"no UTF-8": "U", "partial": "P", "full": ""}
+# why a cell is empty (the tooltips of the n/a cells)
+NA = {("simdjson", "edit"): "simdjson's documents are read-only: it has no API to change a value and write the result"}
+
+
+def geomean(xs):
+    return math.exp(sum(math.log(x) for x in xs) / len(xs))
+
+
+WRITING = ("edit", "minify", "write")   # the use cases that write numbers
+NUMBER_TEXT = ("source numbers", "raw numbers")   # variants that write each number by copying its text
+
+
+def normalize_usecases(data):
+    """Chooses each library's best variants again with the rules of the post: variants that reuse a parser or document
+    across calls, and in-place variants whose copy of the input is made before the timer starts ("(copy untimed)"), are
+    measured but not chosen. Variants that write each number by copying its text instead of formatting
+    it (json_document's number_format::source, yyjson's and RapidJSON's raw numbers in edit, minify and write) are not
+    chosen as the fully validating way, but as a way that does less, marked "N" like "U" and "P". Skipping the number
+    conversion while reading is allowed. Each pick has a "mark": "", or the letters of what it skips"""
+    data = json.loads(json.dumps(data))
+    rank = {"full": 0, "n/a": 0, "no UTF-8": 1, "partial": 2}
+    for uc, files in data.items():
+        numtext = lambda k: uc in WRITING and any(w in k for w in NUMBER_TEXT)
+        for cell in files.values():
+            for e in cell.values():
+                vs = [(v["us"], k, v["level"]) for k, v in e["variants"].items() if "reused" not in k and "copy untimed" not in k]
+                full = [v for v in vs if rank[v[2]] == 0 and not numtext(v[1])]
+                pick = lambda v: {"us": v[0], "variant": v[1], "level": "full" if rank[v[2]] == 0 else v[2],
+                                  "mark": " ".join(m for m in (LEVEL_MARK.get(v[2], ""), "N" if numtext(v[1]) else "") if m)}
+                e["best"] = pick(min(full)) if full else None
+                e["best_any"] = pick(min(vs))
+    return data
+
+
+FILE_NAMES = {"twitter": "twitter.json", "citm_catalog": "citm_catalog.json", "canada": "canada.json",
+              "jeopardy": "jeopardy.json"}
+# what a variant that checks less skips, worded as the trade it is (the tooltips of the heatmaps)
+CHECKS_LESS = [
+    ("simdjson", "On-Demand", "reads lazily: On-Demand reads only what you ask for and steps over the rest by matching brackets"),
+    ("simdjson", "minify", "simdjson::minify() only removes whitespace, without parsing the values"),
+    ("Glaze", "lazy_json", "reads lazily: lazy_json reads only what you ask for and steps over the rest"),
+    ("Glaze", "minify_json", "minify_json only removes whitespace, without parsing the values"),
+    ("Glaze", "generic", "accepts trailing garbage after the value: Glaze's default (validate_trailing_whitespace checks it)"),
+    ("Glaze", "structs", "reads into structs and steps over fields it doesn't know without checking them "
+                         "(validate_skipped checks them too)"),
+    ("RapidJSON", "", "trusts UTF-8: RapidJSON's default (kParseValidateEncodingFlag checks it)"),
+    ("sonic-cpp", "", "trusts UTF-8: sonic-cpp 1.0.2 doesn't check it"),
+    ("serde_json", "", "trusts UTF-8 in the strings it skips (from_slice); strings it reads are checked"),
+]
+# what a variant that copies number text does (the "N" half of edit, minify and write)
+NUMBER_TEXT_TIPS = {
+    "nlohmann json_document": "copies each number's text instead of formatting it (number_format::source)",
+    "yyjson": "copies each number's text instead of formatting it (YYJSON_READ_NUMBER_AS_RAW)",
+    "RapidJSON": "copies each number's text instead of formatting it (kParseNumbersAsStringsFlag)",
+}
+
+
+def checks_less(lib, variant):
+    for l, v, text in CHECKS_LESS:
+        if l == lib and v in variant:
+            return text
+    return "checks less"
+
+
+def usecase_table(data):
+    """{library: {use case: cell}}: per library the geometric mean over UC_FILES of its fastest fully validating time
+    ("full") and of its fastest time at any level ("alt", only if it is at least 3 % faster), each divided by the best
+    such fully validating mean in the use case, so that every file counts equally and the fastest library is 1.00"""
+    out = {}
+    data = normalize_usecases(data)
+    for uc, _ in USE_CASES:
+        files = data.get(uc, {})
+        if not files:
+            continue
+        cells = {}
+        for lib in UC_LIBS:
+            es = [files.get(f, {}).get(lib) for f in UC_FILES]
+            if not all(es):
+                continue
+            full = [e["best"] for e in es]
+            alt = [e["best_any"] for e in es]
+            cells[lib] = {"full": geomean([b["us"] for b in full]) if all(full) else None, "alt": geomean([a["us"] for a in alt]),
+                          "files": [(f, b, a) for f, b, a in zip(UC_FILES, full, alt)]}
+        ref = min(c["full"] for c in cells.values() if c["full"])
+        for lib, c in cells.items():
+            full = c["full"] / ref if c["full"] else None
+            alt = c["alt"] / ref
+            if full is not None and alt > full * 0.97:
+                alt = None
+            levels = {a["level"] for _, _, a in c["files"]} if alt is not None else set()
+            level = "partial" if "partial" in levels else "no UTF-8" if "no UTF-8" in levels else "full"
+            numtext = alt is not None and any("N" in a["mark"].split() for _, _, a in c["files"])
+            marks = " ".join(m for m in (LEVEL_MARK[level], "N" if numtext else "") if m)
+            out.setdefault(lib, {})[uc] = {"full": full, "alt": alt, "level": level, "marks": marks, "files": c["files"]}
+    return out
+
+
+# cell colors: green for the fastest, gray around twice the time, red for the slowest; the upper bounds of the steps
+HEAT_STEPS = [1.15, 1.5, 2.5, 5, float("inf")]
+HEAT_LABELS = ["below 1.15", "1.15 to 1.5", "1.5 to 2.5", "2.5 to 5", "5 and more"]
+
+
+def heat(r):
+    return next(i for i, b in enumerate(HEAT_STEPS) if r < b)
+
+
+def fr(r):
+    return "%.2f" % r if r < 9.995 else "%.1f" % r if r < 99.95 else "%.0f" % r
+
+
+def fus(us):
+    return "{:,.0f} µs".format(us) if us >= 100 else "%.1f µs" % us
+
+
+def tip(lib, uc_label, c, half):
+    """the tooltip of a cell: lines separated by newlines (&#10; in the attribute), the first one the heading"""
+    if half == "full":
+        lines = ["%s · %s" % (UC_LIBS[lib], uc_label),
+                 "%s× the time of the fastest library (fully validating)" % fr(c["full"])]
+        picks = [(f, b) for f, b, _ in c["files"]]
+    else:
+        lines = ["%s · %s, checking less" % (UC_LIBS[lib], uc_label),
+                 "%s× the time of the fastest fully validating library" % fr(c["alt"])]
+        picks = [(f, a) for f, _, a in c["files"]]
+    ways = sorted({e["variant"] for _, e in picks})
+    if len(ways) == 1:
+        lines.append("way: %s" % ways[0])
+    for f, e in picks:
+        lines.append("%s: %s%s%s" % (FILE_NAMES[f], fus(e["us"]), "" if len(ways) == 1 else " · " + e["variant"],
+                                     " (validates fully)" if half == "alt" and e["level"] == "full" else ""))
+    if half == "alt":
+        seen = []
+        for _, e in picks:
+            ts = ([checks_less(lib, e["variant"])] if e["level"] != "full" else []) + \
+                 ([NUMBER_TEXT_TIPS.get(lib, "copies each number's text instead of formatting it")] if "N" in e["mark"].split() else [])
+            for t in ts:
+                if t not in seen:
+                    seen.append(t)
+        lines += seen
+    if any("(copy)" in e["variant"] for _, e in picks):
+        lines.append("(copy): parses in place, on a copy of the input that is part of the time")
+    return "&#10;".join(lines)
+
+
+def heatmap(platform, title):
+    data = json.load((HERE / "data" / ("perf_usecases_%s.json" % platform)).open())
+    t = usecase_table(data)
+    libs = [l for l in UC_LIBS if l in t]
+    score = lambda l: geomean([v["full"] or v["alt"] for v in t[l].values()])   # the mean of the row as shown
+    libs.sort(key=score)
+    W, L, cw, ch, top = 784, 224, 92, 36, 44
+    b, desc = [], []
+    for j, (uc, label) in enumerate(USE_CASES):
+        b.append('<text class="nj-charts-tick" x="%g" y="%g">%s</text>' % (L + j * cw + cw / 2, top - 10, esc(label)))
+    for i, lib in enumerate(libs):
+        y = top + i * ch
+        cls = "nj-charts-name-json" if lib.startswith("nlohmann") else ""
+        b.append('<text class="nj-charts-rowlabel %s" x="%g" y="%g" text-anchor="end">%s</text>' % (cls, L - 8, y + ch / 2 + 4, esc(UC_LIBS[lib])))
+        for j, (uc, label) in enumerate(USE_CASES):
+            x = L + j * cw
+            c = t[lib].get(uc)
+            if c is None:
+                b.append('<g class="nj-heat-cell" tabindex="0" data-tip="%s">' % esc("%s · %s&#10;%s" % (UC_LIBS[lib], label, NA.get((lib, uc), "the library has no API for this use case"))))
+                b.append('<rect class="nj-heat-na" x="%g" y="%g" width="%g" height="%g" rx="3"/>' % (x + 1, y + 1, cw - 2, ch - 2))
+                b.append('<text class="nj-charts-tick" x="%g" y="%g">n/a</text>' % (x + cw / 2, y + ch / 2 + 4))
+                b.append('</g>')
+                desc.append("%s %s: n/a" % (UC_LIBS[lib], label))
+                continue
+            halves = []
+            if c["full"] is not None:
+                halves.append(("full", c["full"]))
+            if c["alt"] is not None:
+                halves.append(("alt", c["alt"]))
+            hw = (cw - 2) / len(halves)
+            for k, (half, r) in enumerate(halves):
+                hx = x + 1 + k * hw
+                gap = 1 if len(halves) == 2 else 0
+                b.append('<g class="nj-heat-cell" tabindex="0" data-tip="%s">' % esc(tip(lib, label, c, half)))
+                b.append('<rect class="nj-heat-%d" x="%g" y="%g" width="%g" height="%g" rx="3"/>'
+                         % (heat(r), hx + (gap if k else 0), y + 1, hw - gap, ch - 2))
+                cx = hx + hw / 2
+                if half == "alt":
+                    b.append('<text class="nj-charts-cell" x="%g" y="%g" text-anchor="middle">%s</text>' % (cx, y + 16, fr(r)))
+                    b.append('<text class="nj-charts-cell nj-charts-cell--small" x="%g" y="%g" text-anchor="middle">%s</text>'
+                             % (cx, y + 29, c["marks"]))
+                else:
+                    b.append('<text class="nj-charts-cell" x="%g" y="%g" text-anchor="middle">%s</text>' % (cx, y + ch / 2 + 4, fr(r)))
+                b.append('</g>')
+            if c["full"] is None:   # no fully validating way: the left half stays empty
+                pass
+            desc.append("%s %s: %s%s" % (UC_LIBS[lib], label, fr(c["full"]) if c["full"] else "no fully validating way",
+                                         (" (%s doing less, %s)" % (fr(c["alt"]), c["marks"])) if c["alt"] else ""))
+    # the key, set apart from the grid and narrower than its columns, so that it doesn't read as a row of it
+    yb = top + len(libs) * ch + 28
+    b.append('<text class="nj-charts-tick nj-charts-tick--l" x="8" y="%g">time relative to the fastest fully validating library, less is better</text>' % (yb + 4))
+    kw, ky = 76, yb + 14
+    for i, lab in enumerate(HEAT_LABELS):
+        # each swatch in its own group, so that the ink rule for the strong steps (a sibling selector) stays inside it
+        b.append('<g><rect class="nj-heat-%d" x="%g" y="%g" width="%g" height="20" rx="3"/>' % (i, 8 + i * (kw + 4), ky, kw))
+        b.append('<text class="nj-charts-cell nj-charts-cell--small" x="%g" y="%g" text-anchor="middle">%s</text></g>' % (8 + i * (kw + 4) + kw / 2, ky + 14, esc(lab)))
+    nx = 8 + len(HEAT_LABELS) * (kw + 4) + 12
+    b.append('<rect class="nj-heat-na" x="%g" y="%g" width="%g" height="20" rx="3"/>' % (nx, ky, 40))
+    b.append('<text class="nj-charts-tick" x="%g" y="%g">n/a</text>' % (nx + 20, ky + 14))
+    b.append('<text class="nj-charts-tick nj-charts-tick--l" x="%g" y="%g">no API for it</text>' % (nx + 48, ky + 14))
+    write("perf_blog_usecases_%s.svg" % platform, W, ky + 28, "nj-charts--blog nj-charts--heat", "nj-blog-uc-" + platform, title,
+          "Table of relative times, libraries by use case. " + "; ".join(desc) + ".", b)
+
+
+if __name__ == "__main__":
+    swar()
+    overlap()
+    digits()
+    heldout()
+    if OVERVIEW:
+        overview()
+    distribution()
+    if TIMELINE:
+        timeline()
+    if CLIFFS:
+        cliffs()
+    price()
+    for platform, title in UC_PLATFORMS:
+        if (HERE / "data" / ("perf_usecases_%s.json" % platform)).exists():
+            heatmap(platform, title)
@@ -0,0 +1,66 @@
+"""Prints the tables of Appendix E of home/blog/how_3_13_0_got_faster.md (comparison with other libraries) as Markdown,
+from data/perf_usecases_<platform>.json, which tests/benchmarks/json_view/others/summarize.py --json writes.
+
+Usage: python3 scripts/figures/perf_blog_tables.py <platform> [title]
+"""
+import json
+import sys
+from pathlib import Path
+
+from perf_blog import normalize_usecases
+
+HERE = Path(__file__).resolve().parent
+FILES = [("twitter", "`twitter.json`"), ("citm_catalog", "`citm_catalog.json`"), ("canada", "`canada.json`"),
+         ("jeopardy", "`jeopardy.json`"), ("status", "one status (2.5 KB)")]
+USE_CASES = [("validate", "validate"), ("sum", "sum"), ("select", "select"), ("edit", "edit"), ("minify", "minify"),
+             ("write", "write")]
+NAMES = {"nlohmann json_document": "nlohmann/json `json_document`", "nlohmann json": "nlohmann/json `json`",
+         "sonic-rs": "sonic-rs (Rust)", "simd-json": "simd-json (Rust)", "serde_json": "serde_json (Rust)"}
+
+
+def fmt(us):
+    if us >= 10000:
+        return "{:,.0f}".format(us)
+    if us >= 100:
+        return "{:,.0f}".format(us)
+    return "%.1f" % us
+
+
+def table(data, uc, indent):
+    files = [f for f, _ in FILES if f in data.get(uc, {})]
+    libs = list(data[uc][files[0]].keys())
+    jd = lambda f: data[uc][f]["nlohmann json_document"]["best"]["us"]
+    libs.sort(key=lambda l: sum(((data[uc][f][l]["best"] or data[uc][f][l]["best_any"])["us"] / jd(f)) for f in files))
+    head = "| library | variant | " + " | ".join(n for f, n in FILES if f in files) + " |"
+    rows = [head, "| --- | --- | " + " | ".join("--:" for _ in files) + " |"]
+    for lib in libs:
+        best = [data[uc][f][lib]["best"] for f in files]
+        anyv = [data[uc][f][lib]["best_any"] for f in files]
+        names = sorted({b["variant"] for b in best if b} | {a["variant"] + " [%s]" % a["mark"] for b, a in zip(best, anyv) if a["mark"] and (not b or a["us"] < b["us"])})
+        cells = []
+        for b, a in zip(best, anyv):
+            c = fmt(b["us"]) if b else "–"
+            if a["mark"] and (not b or a["us"] < b["us"] * 0.97):
+                c += " (%s %s)" % (a["mark"], fmt(a["us"]))
+            cells.append(c)
+        bold = "**%s**" if lib == "nlohmann json_document" else "%s"
+        rows.append("| %s | %s | %s |" % (bold % NAMES.get(lib, lib), ", ".join(names), " | ".join(cells)))
+    return "\n".join(indent + r for r in rows)
+
+
+def main():
+    platform = sys.argv[1]
+    data = json.load((HERE / "data" / ("perf_usecases_%s.json" % platform)).open())
+    data = normalize_usecases(data)   # the same choices as the figure
+    out = []
+    for uc, label in USE_CASES:
+        if uc not in data:
+            continue
+        out.append("**%s**\n" % label)
+        out.append(table(data, uc, ""))
+        out.append("")
+    print("\n".join(out))
+
+
+if __name__ == "__main__":
+    main()
@@ -91,7 +91,7 @@ const typename BasicJsonType::binary_t& binary_value(const BasicJsonType& j)
 }

 template<typename View, enable_if_t<is_json_view<View>::value, int> = 0>
-typename View::basic_json_type::binary_t binary_value(const View& /*unused*/)
+typename View::basic_json_type::binary_t binary_value(const View& /*unused*/) // LCOV_EXCL_LINE
 {
    return {}; // LCOV_EXCL_LINE
 }
@@ -198,18 +198,19 @@ class exception : public std::exception
            // all other parent types (primitives) contribute no token
        }

-        if (tokens.empty())
+        // the root value has no path, but still has a byte range
+        std::string prefix;
+        if (!tokens.empty())
        {
-            return "";
+            const auto str = std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
+                                             [](const std::string & a, const std::string & b)
+            {
+                return concat(a, '/', detail::escape(b));
+            });
+            prefix = concat('(', str, ") ");
        }

-        auto str = std::accumulate(tokens.rbegin(), tokens.rend(), std::string{},
-                                   [](const std::string & a, const std::string & b)
-        {
-            return concat(a, '/', detail::escape(b));
-        });
-
-        return concat('(', str, ") ", get_byte_positions(leaf_element));
+        return concat(prefix, get_byte_positions(leaf_element));
 #else
        return get_byte_positions(leaf_element);
 #endif
@@ -222,7 +223,8 @@ class exception : public std::exception
    template<typename BasicJsonType>
    static std::string get_byte_positions(const BasicJsonType* leaf_element)
    {
-        if ((leaf_element->start_pos() != std::string::npos) && (leaf_element->end_pos() != std::string::npos))
+        // a value-initialized iterator has no value (invalid_iterator.212)
+        if (leaf_element != nullptr && leaf_element->start_pos() != std::string::npos && leaf_element->end_pos() != std::string::npos)
        {
            return concat("(bytes ", std::to_string(leaf_element->start_pos()), "-", std::to_string(leaf_element->end_pos()), ") ");
        }
@@ -431,6 +433,28 @@ std::nullptr_t exception_context(const View& /*unused*/) noexcept
    return nullptr;
 }

+namespace view
+{
+// the path and bytes of the value of a view (defined in <nlohmann/detail/view/errors.hpp>)
+template<typename View>
+std::string diagnostics_of(const View& v);
+}  // namespace view
+
+// what goes in front of the message of an exception about j: nothing for a
+// basic_json value (exception_context() passes the value itself), the context
+// basic_json would add (JSON_DIAGNOSTICS, JSON_DIAGNOSTIC_POSITIONS) for a view
+template<typename BasicJsonType, enable_if_t<is_basic_json<BasicJsonType>::value, int> = 0>
+const char* exception_prefix(const BasicJsonType& /*unused*/) noexcept
+{
+    return "";
+}
+
+template<typename View, enable_if_t<is_json_view<View>::value, int> = 0>
+std::string exception_prefix(const View& v)
+{
+    return view::diagnostics_of(v);
+}
+
 /*!
@brief throws because @a j does not have the type a conversion expects
@param[in] expected  the expected type(s), e.g. "array" or "binary or array"
@@ -442,7 +466,7 @@ JSON_HEDLEY_NO_RETURN JSON_HEDLEY_NEVER_INLINE void throw_type_must_be(const cha
 {
    static_cast<void>(expected); // unused when JSON_NOEXCEPTION is defined
    static_cast<void>(j);
-    JSON_THROW(type_error::create(exception_id::type_mismatch, concat("type must be ", expected, ", but is ", j.type_name()), exception_context(j)));
+    JSON_THROW(type_error::create(exception_id::type_mismatch, concat(exception_prefix(j), "type must be ", expected, ", but is ", j.type_name()), exception_context(j)));
 }

 /*!
@@ -58,6 +58,19 @@
        #define JSON_UNLOCKED_FILE_IO 0
    #endif
    #undef JSON_UNLOCKED_FILE_IO_MSAN
+
+    // Whether file_input_adapter scans the buffer of the FILE directly, as
+    // getc_unlocked() reads it: the fields it uses are those that the C
+    // library's own getc_unlocked() macro uses (glibc: _IO_read_ptr and
+    // _IO_read_end; Apple: _p and _r). It needs the file locked for the whole
+    // parse, as JSON_UNLOCKED_FILE_IO == 1 has it (so JSON_DISABLE_UNLOCKED_FILE_IO
+    // and MemorySanitizer builds turn it off).
+    // (uClibc defines __GLIBC__ as well, but its FILE has other fields)
+    #if JSON_UNLOCKED_FILE_IO == 1 && ((defined(__GLIBC__) && !defined(__UCLIBC__)) || defined(__APPLE__))
+        #define JSON_FILE_WINDOW 1
+    #else
+        #define JSON_FILE_WINDOW 0
+    #endif
 #endif  // JSON_NO_IO

 NLOHMANN_JSON_NAMESPACE_BEGIN
@@ -179,8 +192,12 @@ class token_carry_buffer
    char* m_capacity_end = nullptr;
 };
 /*!
-Input adapter for stdio file access. This adapter read only 1 byte and do not use any
- buffer. This adapter is a very low level adapter.
+Input adapter for stdio file access. The file is locked for the lifetime of the
+adapter and read with the unlocked stdio functions (see
+JSON_DISABLE_UNLOCKED_FILE_IO). With glibc and the Apple C library, the
+characters in the buffer of the FILE are also scanned in bulk, as the get area
+of a stream is (see input_stream_adapter): exactly the characters getc_unlocked()
+would return are consumed, so the file is left where it was left before.
 */
 class file_input_adapter
 {
@@ -199,6 +216,12 @@ class file_input_adapter
    file_input_adapter(const file_input_adapter&) = delete;
    file_input_adapter(file_input_adapter&& rhs) noexcept
        : m_file(rhs.m_file)
+#if JSON_FILE_WINDOW
+        , token_carry(std::move(rhs.token_carry))
+        , token_segment(rhs.token_segment)
+        , current_in_buffer(rhs.current_in_buffer)
+        , tracking_token(rhs.tracking_token)
+#endif
    {
        // the lock is owned by the thread, not the adapter: hand it over
        rhs.m_file = nullptr;
@@ -210,6 +233,20 @@ class file_input_adapter
        unlock();
    }

+#if JSON_FILE_WINDOW
+    std::char_traits<char>::int_type get_character()
+    {
+        // what getc_unlocked() does, while the buffer has characters
+        const char* const next = buffer_ptr();
+        if (JSON_HEDLEY_LIKELY(next != buffer_end()))
+        {
+            current_in_buffer = true;
+            buffer_bump(1);
+            return std::char_traits<char>::to_int_type(*next);
+        }
+        return get_character_slow();
+    }
+#else
    std::char_traits<char>::int_type get_character() noexcept
    {
        // the file is locked for the lifetime of the adapter, so the
@@ -222,6 +259,7 @@ class file_input_adapter
        return std::fgetc(m_file);
 #endif
    }
+#endif

    // returns the number of characters successfully read
    template<class T>
@@ -230,7 +268,134 @@ class file_input_adapter
        return fread(dest, 1, sizeof(T) * count, m_file);
    }

+#if JSON_FILE_WINDOW
+    // The lexer may scan the buffer of the FILE directly, as the window of
+    // input_stream_adapter: the buffer ends wherever the C library's buffer
+    // ends, and is refilled by the next get_character().
+    static constexpr bool supports_bulk_scan = true;
+    static constexpr bool bulk_window = true;
+
+    // Pointer to the next unread character; only valid when bulk_remaining() > 0.
+    const char* bulk_data() const
+    {
+        return buffer_ptr();
+    }
+
+    // Number of unread characters in the buffer.
+    std::size_t bulk_remaining() const
+    {
+        if (!current_in_buffer)
+        {
+            return 0;
+        }
+        return static_cast<std::size_t>(buffer_end() - buffer_ptr());
+    }
+
+    // Consume @a n characters previously inspected via bulk_data().
+    void bulk_skip(std::size_t n)
+    {
+        JSON_ASSERT(n <= bulk_remaining());
+        buffer_bump(n);
+    }
+
+    // The adapter keeps the current token for the lexer's error messages, as
+    // input_stream_adapter does.
+    static constexpr bool supports_token_tracking = true;
+
+    void begin_token() noexcept
+    {
+        tracking_token = true;
+        token_carry.clear();
+        token_segment = buffer_ptr();
+    }
+
+    void mark_token_start(std::char_traits<char>::int_type c)
+    {
+        tracking_token = true;
+        token_carry.clear();
+        if (current_in_buffer)
+        {
+            token_segment = buffer_ptr() - 1;
+        }
+        else
+        {
+            token_segment = nullptr;
+            token_carry.push_back(std::char_traits<char>::to_char_type(c));
+        }
+    }
+
+    void copy_token(std::vector<char>& out, bool drop_last) const
+    {
+        token_carry.copy_to(out);
+        if (token_segment != nullptr)
+        {
+            out.insert(out.end(), token_segment, buffer_ptr());
+        }
+        if (drop_last && !out.empty())
+        {
+            out.pop_back();
+        }
+    }
+#endif
+
  private:
+#if JSON_FILE_WINDOW
+    // the buffer of the FILE: [buffer_ptr(), buffer_end()) are the characters
+    // getc_unlocked() would return next
+#if defined(__GLIBC__)
+    const char* buffer_ptr() const noexcept
+    {
+        return m_file->_IO_read_ptr;
+    }
+    const char* buffer_end() const noexcept
+    {
+        return m_file->_IO_read_end;
+    }
+    void buffer_bump(std::size_t n) noexcept
+    {
+        m_file->_IO_read_ptr += n;
+    }
+#else
+    const char* buffer_ptr() const noexcept
+    {
+        return reinterpret_cast<const char*>(m_file->_p);
+    }
+    const char* buffer_end() const noexcept
+    {
+        return m_file->_r > 0 ? reinterpret_cast<const char*>(m_file->_p) + m_file->_r : reinterpret_cast<const char*>(m_file->_p);
+    }
+    void buffer_bump(std::size_t n) noexcept
+    {
+        m_file->_p += n;
+        m_file->_r -= static_cast<int>(n);
+    }
+#endif
+
+    // the buffer is exhausted: getc_unlocked() refills it
+    JSON_HEDLEY_NEVER_INLINE std::char_traits<char>::int_type get_character_slow()
+    {
+        if (token_segment != nullptr)
+        {
+            token_carry.append(token_segment, buffer_end());
+            token_segment = nullptr;
+        }
+        const auto res = getc_unlocked(m_file);
+        if (res == EOF)
+        {
+            current_in_buffer = false;
+            return std::char_traits<char>::eof();
+        }
+        // the character was taken from the refilled buffer, at buffer_ptr() - 1
+        current_in_buffer = true;
+        if (tracking_token)
+        {
+            token_segment = buffer_ptr() - 1;
+        }
+        return res;
+    }
+
+#endif
+
    // Lock the file once for the whole parse instead of once per character.
    // The lock is recursive, so fread() and the user's own stdio calls on the
    // same thread keep working.
@@ -259,6 +424,16 @@ class file_input_adapter

    /// the file pointer to read from
    std::FILE* m_file;
+#if JSON_FILE_WINDOW
+    /// the part of the current token that was in earlier buffers
+    token_carry_buffer token_carry{}; // NOLINT(readability-redundant-member-init)
+    /// start of the current token's part in the buffer, or nullptr
+    const char* token_segment = nullptr;
+    /// whether the character last returned by get_character() is in the buffer
+    bool current_in_buffer = false;
+    /// whether a token is tracked at all; the binary readers never start one
+    bool tracking_token = false;
+#endif
 };

 /*!
@@ -545,12 +720,9 @@ class input_stream_adapter
    std::char_traits<char>::int_type get_character_slow()
    {
 #if !JSON_DISABLE_STREAM_BULK_SCAN
-        // sbumpc() refills the get area if it is exhausted
-        const bool refill = streambuf_access::get_ptr(sb) == streambuf_access::get_end(sb);
-        if (JSON_HEDLEY_UNLIKELY(refill))
-        {
-            save_token_segment();
-        }
+        // the get area is exhausted (get_character() handles the other case),
+        // so sbumpc() refills it
+        save_token_segment();
 #endif

        auto res = sb->sbumpc();
@@ -563,17 +735,13 @@ class input_stream_adapter
            is->clear(is->rdstate() | std::ios::eofbit);
        }
 #if !JSON_DISABLE_STREAM_BULK_SCAN
-        else if (JSON_HEDLEY_UNLIKELY(refill))
+        else
        {
            // the consumed character is at gptr() - 1, unless the streambuf
            // has no get area and returned it from uflow()
            const char* const next = streambuf_access::get_ptr(sb);
            after_refill(res, next != nullptr && next != streambuf_access::get_begin(sb));
        }
-        else
-        {
-            current_in_get_area = true;
-        }
 #endif
        return res;
    }
@@ -904,7 +904,8 @@ class json_sax_dom_parser : public json_sax_dom_error_state
            {
                hashes.push_back(hasher(element.first));
            }
-            ordered_data.key_indexes.emplace_back(new object_key_index(std::move(hashes)));
+            std::unique_ptr<object_key_index> index(new object_key_index(std::move(hashes))); // NOLINT(cppcoreguidelines-owning-memory,modernize-make-unique): std::make_unique is C++14
+            ordered_data.key_indexes.push_back(std::move(index));
            f.ordered.index = ordered_data.key_indexes.back().get();
        }

@@ -999,7 +1000,7 @@ class json_sax_dom_parser : public json_sax_dom_error_state
        ordered_data.members[f.ordered.dest_member].second = std::move(value);
    }

-    static void place_member(const frame& /*f*/, BasicJsonType&& /*value*/, std::false_type /*indexed*/) noexcept {}
+    static void place_member(const frame& /*f*/, BasicJsonType&& /*value*/, std::false_type /*indexed*/) noexcept {} // LCOV_EXCL_LINE

    /// store the members of a new object directly in it
    bool start_stored_object(std::size_t len)
@@ -1303,7 +1304,7 @@ class json_sax_dom_parser : public json_sax_dom_error_state
        {
            // a new member is null and holds nothing: construct the value
            // over it instead of destroying and swapping
-            ::new (static_cast<void*>(&member)) BasicJsonType(std::forward<Value>(v));
+            construct_member(member, std::forward<Value>(v), std::is_nothrow_constructible<BasicJsonType, Value> {});
        }
        else
        {
@@ -1312,6 +1313,26 @@ class json_sax_dom_parser : public json_sax_dom_error_state
        }
    }

+    /// constructing the value cannot throw (for example a number or a boolean): construct it in place
+    template<typename Value>
+    JSON_HEDLEY_ALWAYS_INLINE
+    static void construct_member(BasicJsonType& member, Value&& v, std::true_type /*nothrow*/)
+    {
+        ::new (static_cast<void*>(&member)) BasicJsonType(std::forward<Value>(v));
+    }
+
+    /// constructing the value can throw (for example a container or a string), and a
+    /// constructor that was interrupted must not have touched the member (#5985):
+    /// create the value first, then move it over the member (the move constructor is
+    /// noexcept)
+    template<typename Value>
+    JSON_HEDLEY_ALWAYS_INLINE
+    static void construct_member(BasicJsonType& member, Value&& v, std::false_type /*may throw*/)
+    {
+        BasicJsonType value(std::forward<Value>(v));
+        ::new (static_cast<void*>(&member)) BasicJsonType(std::move(value));
+    }
+
    /// a custom base class may care about the lifetime of the value
    template<typename Value>
    static void set_member(BasicJsonType& member, Value&& v, std::false_type /*custom base*/)
@@ -1737,7 +1758,7 @@ class json_sax_dom_callback_parser : public json_sax_dom_error_state
        key_stack.push_back(val);

        // add discarded value at the given key and store the reference for later
-        if (keep && ref_stack.back())
+        if (keep)
        {
            auto& obj = *ref_stack.back()->m_data.m_value.object;
            // a single lookup: insert the placeholder, or find the existing member
@@ -1794,7 +1815,7 @@ class json_sax_dom_callback_parser : public json_sax_dom_error_state

        const string_t object_key = pop_container();

-        if (!ref_stack.empty() && ref_stack.back() && ref_stack.back()->is_structured())
+        if (!ref_stack.empty() && ref_stack.back())
        {
            // remove discarded value
            remove_discarded_value(*ref_stack.back(), object_key);
@@ -1960,8 +1981,7 @@ class json_sax_dom_callback_parser : public json_sax_dom_error_state
    */
    string_t current_key() const
    {
-        if (!ref_stack.empty() && ref_stack.back() && ref_stack.back()->is_object()
-                && !key_stack.empty())
+        if (!ref_stack.empty() && ref_stack.back() && ref_stack.back()->is_object())
        {
            return key_stack.back();
        }
@@ -209,8 +209,13 @@ constexpr bool input_adapter_bulk_window(std::false_type /*detected*/)
@brief lexical analysis

 This class organizes the lexical analysis during JSON deserialization.
+
+DiscardValues: the caller only needs the token types and never looks at the values of number and string tokens (only
+accept(), which parses through json_sax_acceptor). A template parameter rather than a member, so that the lexer of
+parse() is compiled without the paths of accept(): with both string scans in one scan(), parse() was up to 2 % slower
+on Apple M1.
 */
-template<typename BasicJsonType, typename InputAdapterType>
+template<typename BasicJsonType, typename InputAdapterType, bool DiscardValues = false>
 class lexer : public lexer_base<BasicJsonType>
 {
    using number_integer_t = typename BasicJsonType::number_integer_t;
@@ -268,10 +273,9 @@ class lexer : public lexer_base<BasicJsonType>
  public:
    using token_type = typename lexer_base<BasicJsonType>::token_type;

-    explicit lexer(InputAdapterType&& adapter, bool ignore_comments_ = false, bool discard_number_values_ = false) noexcept
+    explicit lexer(InputAdapterType&& adapter, bool ignore_comments_ = false) noexcept
        : ia(std::move(adapter))
        , ignore_comments(ignore_comments_)
-        , discard_number_values(discard_number_values_)
    {
        // the token string of an error before the first token is everything
        // read so far
@@ -296,14 +300,16 @@ class lexer : public lexer_base<BasicJsonType>
    /// calls would (including the position and token bookkeeping of a
    /// streaming adapter, see bulk_consume) and leaves @a current holding the last of
    /// the 4 digits, just as the last such get() would; the codepoint is
-    /// written to @a out. Makes no state change and returns false for a
-    /// pending unget, fewer than 4 remaining bytes, or any of the 4 bytes not
-    /// being a hex digit, so the caller falls back unchanged to the
-    /// per-character loop, which then reports the same diagnostic (stopping
-    /// at the first invalid digit) as before this optimization.
+    /// written to @a out. Makes no state change and returns false for fewer
+    /// than 4 remaining bytes or any of the 4 bytes not being a hex digit, so
+    /// the caller falls back unchanged to the per-character loop, which then
+    /// reports the same diagnostic (stopping at the first invalid digit) as
+    /// before this optimization.
    bool get_codepoint_bulk(std::true_type /*bulk*/, int& out)
    {
-        if (next_unget || ia.bulk_remaining() < 4)
+        // no unget is pending inside a string (see get_after_string_run())
+        JSON_ASSERT(!next_unget);
+        if (ia.bulk_remaining() < 4)
        {
            return false;
        }
@@ -388,6 +394,8 @@ class lexer : public lexer_base<BasicJsonType>
    checks if it is inside the range. If a violation was detected, set up an
    error message and return false. Otherwise, return true.

+    @param[in] keep    whether the bytes are added to token_buffer (false for
+                       accept(), see scan())
    @param[in] ranges  list of integers; interpreted as list of pairs of
                       inclusive lower and upper bound, respectively

@@ -396,17 +404,18 @@ class lexer : public lexer_base<BasicJsonType>

    @return true if and only if no range violation was detected
    */
-    bool next_byte_in_range(std::initializer_list<char_int_type> ranges)
+    template<bool Keep>
+    bool next_byte_in_range(std::integral_constant<bool, Keep> keep, std::initializer_list<char_int_type> ranges)
    {
        JSON_ASSERT(ranges.size() == 2 || ranges.size() == 4 || ranges.size() == 6);
-        add(current);
+        add_string_char(keep, current);

        for (auto range = ranges.begin(); range != ranges.end(); ++range)
        {
            get();
            if (JSON_HEDLEY_LIKELY(*range <= current && current <= *(++range))) // NOLINT(bugprone-inc-dec-in-conditions)
            {
-                add(current);
+                add_string_char(keep, current);
            }
            else
            {
@@ -419,20 +428,21 @@ class lexer : public lexer_base<BasicJsonType>
    }

    /// contiguous input: bulk-append the run of ordinary characters and complete
-    /// well-formed UTF-8 sequences starting at the current read position, then
+    /// well-formed UTF-8 sequences starting at the current read position (only
+    /// skip it if @a keep is false), then
    /// read the first byte that needs individual handling (the closing quote, an
    /// escape, a control character, or an ill-formed UTF-8 byte) like get().
    /// That byte is taken from the buffer that was just scanned. Through get(),
    /// Apple Clang merged this read with the other get() calls of the scan
    /// function, which load the read position again right after it was stored
    /// (3% of json::accept() on jeopardy.json on Apple M1).
-    char_int_type get_after_string_run(std::true_type /*bulk*/)
+    template<bool Keep>
+    char_int_type get_after_string_run(std::true_type /*bulk*/, std::integral_constant<bool, Keep> keep)
    {
-        // a pending unget must be consumed through the normal path first
-        if (next_unget)
-        {
-            return get();
-        }
+        // scan_string() is entered from scan_after_whitespace(), whose current
+        // was read by skip_whitespace() (its first get() clears a pending
+        // unget), and nothing in scan_string() calls unget()
+        JSON_ASSERT(!next_unget);
        const std::size_t remaining = ia.bulk_remaining();
        if (remaining == 0)
        {
@@ -444,7 +454,7 @@ class lexer : public lexer_base<BasicJsonType>
        const std::size_t pos = lexer_string_bulk_run(data, remaining);
        if (pos != 0)
        {
-            token_buffer.append(reinterpret_cast<const typename string_t::value_type*>(data), pos);
+            append_string_run(keep, data, pos);
            bulk_consume(reinterpret_cast<const char*>(data), pos);
        }
        if (pos == remaining)
@@ -488,7 +498,8 @@ class lexer : public lexer_base<BasicJsonType>
    }

    /// streaming input: no bulk fast path
-    char_int_type get_after_string_run(std::false_type /*bulk*/)
+    template<bool Keep>
+    char_int_type get_after_string_run(std::false_type /*bulk*/, std::integral_constant<bool, Keep> /*keep*/)
    {
        return get();
    }
@@ -502,13 +513,18 @@ class lexer : public lexer_base<BasicJsonType>
    may contain \0 bytes), and token_buffer.size() is the number of bytes in the
    string.

+    @param[in] keep  whether the string is copied into token_buffer; if false
+                     (accept(), see scan()), it is only checked, with the same
+                     errors, and token_buffer stays empty
+
    @return token_type::value_string if string could be successfully scanned,
            token_type::parse_error otherwise

    @note In case of errors, variable error_message contains a textual
          description.
    */
-    token_type scan_string()
+    template<bool Keep>
+    token_type scan_string(std::integral_constant<bool, Keep> keep)
    {
        // reset token_buffer (ignore opening quote)
        reset();
@@ -520,7 +536,7 @@ class lexer : public lexer_base<BasicJsonType>
        {
            // bulk-consume ordinary characters from contiguous input, then
            // get the next character, the one that ends the run
-            switch (get_after_string_run(std::integral_constant<bool, bulk_scan>()))
+            switch (get_after_string_run(std::integral_constant<bool, bulk_scan>(), keep))
            {
                // end of file while parsing the string
                case char_traits<char_type>::eof():
@@ -542,35 +558,35 @@ class lexer : public lexer_base<BasicJsonType>
                    {
                        // quotation mark
                        case '\"':
-                            add('\"');
+                            add_string_char(keep, '\"');
                            break;
                        // reverse solidus
                        case '\\':
-                            add('\\');
+                            add_string_char(keep, '\\');
                            break;
                        // solidus
                        case '/':
-                            add('/');
+                            add_string_char(keep, '/');
                            break;
                        // backspace
                        case 'b':
-                            add('\b');
+                            add_string_char(keep, '\b');
                            break;
                        // form feed
                        case 'f':
-                            add('\f');
+                            add_string_char(keep, '\f');
                            break;
                        // line feed
                        case 'n':
-                            add('\n');
+                            add_string_char(keep, '\n');
                            break;
                        // carriage return
                        case 'r':
-                            add('\r');
+                            add_string_char(keep, '\r');
                            break;
                        // tab
                        case 't':
-                            add('\t');
+                            add_string_char(keep, '\t');
                            break;

                        // unicode escapes
@@ -638,10 +654,7 @@ class lexer : public lexer_base<BasicJsonType>
                            JSON_ASSERT(0x00 <= codepoint && codepoint <= 0x10FFFF);

                            // translate codepoint into bytes
-                            encode_utf8(static_cast<std::uint32_t>(codepoint), [this](std::uint32_t byte)
-                            {
-                                add(static_cast<char_int_type>(byte));
-                            });
+                            add_codepoint(keep, codepoint);

                            break;
                        }
@@ -824,7 +837,7 @@ class lexer : public lexer_base<BasicJsonType>
                case 0x7E:
                case 0x7F:
                {
-                    add(current);
+                    add_string_char(keep, current);
                    break;
                }

@@ -860,7 +873,7 @@ class lexer : public lexer_base<BasicJsonType>
                case 0xDE:
                case 0xDF:
                {
-                    if (JSON_HEDLEY_UNLIKELY(!next_byte_in_range({0x80, 0xBF})))
+                    if (JSON_HEDLEY_UNLIKELY(!next_byte_in_range(keep, {0x80, 0xBF})))
                    {
                        return token_type::parse_error;
                    }
@@ -870,7 +883,7 @@ class lexer : public lexer_base<BasicJsonType>
                // U+0800..U+0FFF: bytes E0 A0..BF 80..BF
                case 0xE0:
                {
-                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0xA0, 0xBF, 0x80, 0xBF}))))
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range(keep, {0xA0, 0xBF, 0x80, 0xBF}))))
                    {
                        return token_type::parse_error;
                    }
@@ -894,7 +907,7 @@ class lexer : public lexer_base<BasicJsonType>
                case 0xEE:
                case 0xEF:
                {
-                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x80, 0xBF, 0x80, 0xBF}))))
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range(keep, {0x80, 0xBF, 0x80, 0xBF}))))
                    {
                        return token_type::parse_error;
                    }
@@ -904,7 +917,7 @@ class lexer : public lexer_base<BasicJsonType>
                // U+D000..U+D7FF: bytes ED 80..9F 80..BF
                case 0xED:
                {
-                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x80, 0x9F, 0x80, 0xBF}))))
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range(keep, {0x80, 0x9F, 0x80, 0xBF}))))
                    {
                        return token_type::parse_error;
                    }
@@ -914,7 +927,7 @@ class lexer : public lexer_base<BasicJsonType>
                // U+10000..U+3FFFF F0 90..BF 80..BF 80..BF
                case 0xF0:
                {
-                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x90, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range(keep, {0x90, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
                    {
                        return token_type::parse_error;
                    }
@@ -926,7 +939,7 @@ class lexer : public lexer_base<BasicJsonType>
                case 0xF2:
                case 0xF3:
                {
-                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x80, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range(keep, {0x80, 0xBF, 0x80, 0xBF, 0x80, 0xBF}))))
                    {
                        return token_type::parse_error;
                    }
@@ -936,7 +949,7 @@ class lexer : public lexer_base<BasicJsonType>
                // U+100000..U+10FFFF F4 80..8F 80..BF 80..BF
                case 0xF4:
                {
-                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range({0x80, 0x8F, 0x80, 0xBF, 0x80, 0xBF}))))
+                    if (JSON_HEDLEY_UNLIKELY(!(next_byte_in_range(keep, {0x80, 0x8F, 0x80, 0xBF, 0x80, 0xBF}))))
                    {
                        return token_type::parse_error;
                    }
@@ -1398,7 +1411,7 @@ scan_number_done:
                return token_type::value_unsigned;
            }
        }
-        else if (number_type == token_type::value_integer)
+        else // value_integer (the callers handle value_float themselves)
        {
            if (parse_integer_signed(first, last, value_integer))
            {
@@ -1427,7 +1440,7 @@ scan_number_done:
    token_type convert_number(token_type number_type, std::size_t mantissa_end)
    {
        // accept() only needs to know whether the input is valid, so it sets
-        // discard_number_values (see json.hpp), and an integer token whose
+        // discard_values (see json.hpp), and an integer token whose
        // digit count shows that it fits is reported without calling
        // convert_integer(). A number with up to 18 digits always fits into
        // both std::uint64_t and std::int64_t (18 nines is about 1e18, below
@@ -1442,7 +1455,7 @@ scan_number_done:
        // json_sax_acceptor, whose number callbacks discard their argument and
        // return true, and the parser rejects neither integers nor finite
        // floats. value_unsigned/value_integer are left unset here, so a caller
-        // that reads the converted value must not set discard_number_values.
+        // that reads the converted value must not set discard_values.
        //
        // On contiguous input, scan_number_bulk_contiguous() converts integer
        // tokens itself and does not pass them to this function, unless
@@ -1450,7 +1463,7 @@ scan_number_done:
        // reached for input without bulk access (e.g. streams), with
        // JSON_DIAGNOSTIC_POSITIONS, or when scan_number_bulk_contiguous()
        // falls back to scan_number().
-        if (discard_number_values)
+        if (discard_values())
        {
            constexpr std::size_t safe_digit_count = 18;
            if (number_type == token_type::value_unsigned && token_buffer.size() <= safe_digit_count)
@@ -1504,11 +1517,9 @@ scan_number_done:
    */
    token_type scan_number_bulk_contiguous()
    {
-        // a pending unget offsets the buffer position from current; fall back
-        if (next_unget)
-        {
-            return token_type::uninitialized;
-        }
+        // called right after scan_after_whitespace() read current (see
+        // get_after_string_run()), so no unget is pending
+        JSON_ASSERT(!next_unget);
        const std::size_t rem = ia.bulk_remaining();
        if (rem == 0)
        {
@@ -1529,11 +1540,7 @@ scan_number_done:
        if (data[0] == '-')
        {
            number_type = token_type::value_integer;
-            i = 1;
-            if (i >= avail)
-            {
-                return token_type::uninitialized;
-            }
+            i = 1; // avail >= 2: rem == 0 returned above
        }
        const std::size_t integer_begin = i;
        if (data[i] == '0')
@@ -1701,7 +1708,7 @@ scan_number_done:
        // w < 10^19, so a value below 10^max_exponent10 cannot overflow, and a
        // value that underflows is a finite number as well. Only a token that
        // may overflow has to be converted to find out.
-        if (JSON_HEDLEY_UNLIKELY(discard_number_values && s.exponent + 19 <= std::numeric_limits<number_float_t>::max_exponent10))
+        if (JSON_HEDLEY_UNLIKELY(discard_values() && s.exponent + 19 <= std::numeric_limits<number_float_t>::max_exponent10))
        {
            value_float = 0;
            return true;
@@ -1775,7 +1782,10 @@ scan_number_done:
    /// the error at the right character
    JSON_HEDLEY_ALWAYS_INLINE bool scan_literal_bulk(const char* rest, const std::size_t length, std::true_type /*bulk*/)
    {
-        if (next_unget || ia.bulk_remaining() < length
+        // called right after scan_after_whitespace() read current (see
+        // get_after_string_run()), so no unget is pending
+        JSON_ASSERT(!next_unget);
+        if (ia.bulk_remaining() < length
                || std::memcmp(ia.bulk_data(), rest, length) != 0)
        {
            return false;
@@ -2033,6 +2043,34 @@ scan_number_done:
        token_buffer.push_back(static_cast<typename string_t::value_type>(c));
    }

+    /// add a character of a string token; accept() checks the string but does
+    /// not keep its value (@a keep is false)
+    void add_string_char(std::true_type /*keep*/, char_int_type c)
+    {
+        token_buffer.push_back(static_cast<typename string_t::value_type>(c));
+    }
+
+    static void add_string_char(std::false_type /*keep*/, char_int_type /*c*/) noexcept {}
+
+    /// add the UTF-8 bytes of a code point from a \\u escape to a string token
+    void add_codepoint(std::true_type /*keep*/, int codepoint)
+    {
+        encode_utf8(static_cast<std::uint32_t>(codepoint), [this](std::uint32_t byte)
+        {
+            add(static_cast<char_int_type>(byte));
+        });
+    }
+
+    static void add_codepoint(std::false_type /*keep*/, int /*codepoint*/) noexcept {}
+
+    /// append a run of ordinary string characters (see get_after_string_run())
+    void append_string_run(std::true_type /*keep*/, const unsigned char* data, std::size_t n)
+    {
+        token_buffer.append(reinterpret_cast<const typename string_t::value_type*>(data), n);
+    }
+
+    static void append_string_run(std::false_type /*keep*/, const unsigned char* /*data*/, std::size_t /*n*/) noexcept {}
+
  public:
    /////////////////////
    // value getters
@@ -2427,7 +2465,9 @@ scan_number_done:

            // string
            case '\"':
-                return scan_string();
+                // accept() (DiscardValues) checks strings without copying them
+                // into token_buffer
+                return scan_string(keep_strings {});

            // number
            case '-':
@@ -2512,11 +2552,19 @@ scan_number_done:
    std::size_t decimal_point_position = std::string::npos;

    /// whether the caller only needs the token types and never looks at the
-    /// converted numeric values; set only by accept(), which parses through
-    /// json_sax_acceptor. When set, convert_number() skips converting integer
-    /// tokens whose digit count guarantees that they fit into 64 bits (see
-    /// there)
-    const bool discard_number_values = false;
+    /// values of number and string tokens; DiscardValues, set only by accept(), which parses
+    /// through json_sax_acceptor. When set, convert_number() skips converting
+    /// integer tokens whose digit count guarantees that they fit into 64 bits
+    /// (see there), floats are converted only when they may overflow (see
+    /// convert_accumulated_float()), and strings are checked without being
+    /// copied into token_buffer (see scan())
+    static bool discard_values() noexcept
+    {
+        return DiscardValues;
+    }
+
+    /// the tag of scan_string(): whether string tokens are kept
+    using keep_strings = typename std::conditional<DiscardValues, std::false_type, std::true_type>::type;
 };

 }  // namespace detail
@@ -72,14 +72,14 @@ This class implements a parser for JSON text. Nested arrays and objects are trac
 stack instead of recursion, so deeply nested input does not exhaust the call stack, and what is read
 is reported as SAX events.
 */
-template<typename BasicJsonType, typename InputAdapterType>
+template<typename BasicJsonType, typename InputAdapterType, bool DiscardValues = false>
 class parser
 {
    using number_integer_t = typename BasicJsonType::number_integer_t;
    using number_unsigned_t = typename BasicJsonType::number_unsigned_t;
    using number_float_t = typename BasicJsonType::number_float_t;
    using string_t = typename BasicJsonType::string_t;
-    using lexer_t = lexer<BasicJsonType, InputAdapterType>;
+    using lexer_t = lexer<BasicJsonType, InputAdapterType, DiscardValues>;
    using token_type = typename lexer_t::token_type;

  public:
@@ -88,10 +88,9 @@ class parser
                    parser_callback_t<BasicJsonType> cb = nullptr,
                    const bool allow_exceptions_ = true,
                    const bool ignore_comments = false,
-                    const bool ignore_trailing_commas_ = false,
-                    const bool discard_number_values_ = false)
+                    const bool ignore_trailing_commas_ = false)
        : callback(std::move(cb))
-        , m_lexer(std::move(adapter), ignore_comments, discard_number_values_)
+        , m_lexer(std::move(adapter), ignore_comments)
        , allow_exceptions(allow_exceptions_)
        , ignore_trailing_commas(ignore_trailing_commas_)
    {
@@ -574,14 +573,7 @@ class parser

    std::string exception_message(const token_type expected, const std::string& context)
    {
-        std::string error_msg = "syntax error ";
-
-        if (!context.empty())
-        {
-            error_msg += concat("while parsing ", context, ' ');
-        }
-
-        error_msg += "- ";
+        std::string error_msg = concat("syntax error while parsing ", context, " - ");

        if (last_token == token_type::parse_error)
        {
@@ -599,7 +591,7 @@ class parser
        }

        return error_msg;
-    }
+    } // LCOV_EXCL_LINE (exception cleanup only)

  private:
    /// callback function
@@ -322,6 +322,78 @@ JSON_SCAN_SSSE3_TARGET JSON_HEDLEY_NEVER_INLINE inline bool vector_utf8_run(cons
    block_out = block;
    return false;
 }
+
+/*!
+@brief skip 16-byte blocks of well-formed UTF-8 at p (a character boundary)
+
+Like vector_utf8_run, but quotes, backslashes, and control characters are
+ordinary characters. Returns the start of the first block in which the check
+found an error (which may belong to a sequence begun in the block before) or
+where fewer than 16 bytes are left; a sequence may be cut at that point, so the
+caller resumes at its start, one sequence at a time.
+*/
+JSON_SCAN_SSSE3_TARGET JSON_HEDLEY_NEVER_INLINE inline const unsigned char* vector_utf8_valid_blocks(const unsigned char* block, const unsigned char* e) noexcept
+{
+    using lookup = utf8_lookup4<>;
+#if JSON_SCAN_NEON
+    const uint8x16_t t1h = vld1q_u8(lookup::byte_1_high.data());
+    const uint8x16_t t1l = vld1q_u8(lookup::byte_1_low.data());
+    const uint8x16_t t2h = vld1q_u8(lookup::byte_2_high.data());
+    uint8x16_t prev = vdupq_n_u8(0);
+    while (e - block >= 16)
+    {
+        const uint8x16_t in = vld1q_u8(block);
+        if (vmaxvq_u8(vorrq_u8(in, prev)) < 0x80)
+        {
+            // ASCII here, and no sequence from the block before to finish
+            prev = in;
+            block += 16;
+            continue;
+        }
+        const uint8x16_t prev1 = vextq_u8(prev, in, 15);
+        const uint8x16_t sc = vandq_u8(vandq_u8(vqtbl1q_u8(t1h, vshrq_n_u8(prev1, 4)), vqtbl1q_u8(t1l, vandq_u8(prev1, vdupq_n_u8(0x0F)))), vqtbl1q_u8(t2h, vshrq_n_u8(in, 4)));
+        const uint8x16_t must23 = vorrq_u8(vqsubq_u8(vextq_u8(prev, in, 14), vdupq_n_u8(0xE0 - 0x80)), vqsubq_u8(vextq_u8(prev, in, 13), vdupq_n_u8(0xF0 - 0x80)));
+        const uint8x16_t err = veorq_u8(vandq_u8(must23, vdupq_n_u8(0x80)), sc);
+        if (vmaxvq_u8(err) != 0)
+        {
+            break;
+        }
+        prev = in;
+        block += 16;
+    }
+#else
+    const __m128i t1h = _mm_loadu_si128(static_cast<const __m128i*>(static_cast<const void*>(lookup::byte_1_high.data()))); // NOLINT(bugprone-casting-through-void)
+    const __m128i t1l = _mm_loadu_si128(static_cast<const __m128i*>(static_cast<const void*>(lookup::byte_1_low.data()))); // NOLINT(bugprone-casting-through-void)
+    const __m128i t2h = _mm_loadu_si128(static_cast<const __m128i*>(static_cast<const void*>(lookup::byte_2_high.data()))); // NOLINT(bugprone-casting-through-void)
+    const __m128i nibble = _mm_set1_epi8(0x0F);
+    const __m128i zero = _mm_setzero_si128();
+    __m128i prev = zero;
+    while (e - block >= 16)
+    {
+        const __m128i in = _mm_loadu_si128(static_cast<const __m128i*>(static_cast<const void*>(block))); // NOLINT(bugprone-casting-through-void)
+        if (_mm_movemask_epi8(_mm_or_si128(in, prev)) == 0)
+        {
+            prev = in;
+            block += 16;
+            continue;
+        }
+        const __m128i prev1 = _mm_alignr_epi8(in, prev, 15);
+        const __m128i sc = _mm_and_si128(_mm_and_si128(_mm_shuffle_epi8(t1h, _mm_and_si128(_mm_srli_epi16(prev1, 4), nibble)),
+                                         _mm_shuffle_epi8(t1l, _mm_and_si128(prev1, nibble))),
+                                         _mm_shuffle_epi8(t2h, _mm_and_si128(_mm_srli_epi16(in, 4), nibble)));
+        const __m128i must23 = _mm_or_si128(_mm_subs_epu8(_mm_alignr_epi8(in, prev, 14), _mm_set1_epi8(0xE0 - 0x80)),
+                                            _mm_subs_epu8(_mm_alignr_epi8(in, prev, 13), _mm_set1_epi8(0xF0 - 0x80)));
+        const __m128i err = _mm_xor_si128(_mm_and_si128(must23, _mm_set1_epi8(static_cast<char>(-128))), sc);
+        if (_mm_movemask_epi8(_mm_cmpeq_epi8(err, zero)) != 0xFFFF)
+        {
+            break;
+        }
+        prev = in;
+        block += 16;
+    }
+#endif
+    return block;
+}
 #endif

 }  // namespace detail
@@ -90,6 +90,34 @@ JSON_HEDLEY_ALWAYS_INLINE std::size_t find_string_special(const unsigned char* d
    return n;
 }

+// return the index of the first 0x00 byte in [data, data+n), or n if there is
+// none; scans 8 bytes at a time (BSON's C-style strings)
+JSON_HEDLEY_ALWAYS_INLINE std::size_t find_zero_byte(const unsigned char* data, std::size_t n) noexcept
+{
+    constexpr std::uint64_t ones = 0x0101010101010101ull;
+    constexpr std::uint64_t high = 0x8080808080808080ull;
+    std::size_t i = 0;
+    for (; i + 8 <= n; i += 8)
+    {
+        const std::uint64_t v = read_eight_bytes(data + i);
+        const std::uint64_t zero = (v - ones) & ~v & high;
+        if (zero != 0)
+        {
+            // the lowest flagged byte is the first zero byte (see
+            // find_string_special())
+            return i + (static_cast<std::size_t>(count_trailing_zeros(zero)) / 8);
+        }
+    }
+    for (; i < n; ++i)
+    {
+        if (data[i] == 0x00)
+        {
+            return i;
+        }
+    }
+    return n;
+}
+
 // classify a byte as one the serializer must NOT copy verbatim when
 // ensure_ascii is requested: the closing quote, an escape, a control character
 // (< 0x20), DEL (0x7F), or any non-ASCII byte (>= 0x80). Everything else -
@@ -236,6 +264,64 @@ inline std::size_t valid_utf8_prefix(const unsigned char* data, std::size_t n) n
    return pos;
 }

+/*!
+@brief whether [data, data+n) is valid UTF-8, for checking whole strings
+
+The same answer as valid_utf8_prefix(data, n) == n. Short ASCII strings, the
+most common keys and values, are decided in one test, and long strings are
+checked 16 bytes at a time where the vector check is available.
+*/
+inline bool valid_utf8_string(const unsigned char* data, std::size_t n) noexcept
+{
+    constexpr std::uint64_t high = 0x8080808080808080ull;
+    if (n <= 16)
+    {
+        // two overlapping words cover 8 to 16 bytes, one partial word fewer
+        std::uint64_t first = 0;
+        std::uint64_t last = 0;
+        if (n >= 8)
+        {
+            std::memcpy(&first, data, sizeof(first));
+            std::memcpy(&last, data + n - 8, sizeof(last));
+        }
+        else if (n != 0)
+        {
+            std::memcpy(&first, data, n);
+        }
+        if (((first | last) & high) == 0)
+        {
+            return true;
+        }
+    }
+#if JSON_SCAN_VECTOR_UTF8
+    else if (n >= 32
+#if JSON_SCAN_SSSE3_DISPATCH
+             && cpu_has_ssse3()
+#endif
+            )
+    {
+        const unsigned char* block = vector_utf8_valid_blocks(data, data + n);
+        // the rest from the start of a sequence that may be cut at block
+        for (int i = 1; i <= 3 && block - i >= data; ++i)
+        {
+            const unsigned char c = block[-i];
+            if (c < 0x80)
+            {
+                break;
+            }
+            if (c >= 0xC0)
+            {
+                block -= i;
+                break;
+            }
+        }
+        const auto checked = static_cast<std::size_t>(block - data);
+        return checked + valid_utf8_prefix(block, n - checked) == n;
+    }
+#endif
+    return valid_utf8_prefix(data, n) == n;
+}
+
 #if JSON_SCAN_VECTOR_UTF8
 /// the end of scan_string_vector from block, where the vector loop stopped
 /// (ill-formed UTF-8, or fewer than 16 bytes left): one byte or sequence at a
@@ -108,6 +108,9 @@ class iter_impl // NOLINT(cppcoreguidelines-special-member-functions,hicpp-speci
    {
        JSON_ASSERT(m_object != nullptr);

+        // m_it is already value-initialized, so this is not needed for
+        // correctness; it is kept because GCC generates faster loops with it
+        // (iterating a parsed document is 0.5-2.7 % slower without it, #6005)
        if (m_object->is_object())
        {
            m_it.object_iterator = typename object_t::iterator();
@@ -304,7 +304,7 @@ class json_pointer
        result.reference_tokens.insert(result.reference_tokens.end(), lhs.reference_tokens.begin(), lhs.reference_tokens.end());
        result.reference_tokens.insert(result.reference_tokens.end(), rhs.reference_tokens.begin(), rhs.reference_tokens.end());
        return result;
-    }
+    } // LCOV_EXCL_LINE (exception cleanup only)

    /// @brief create a new JSON pointer by appending the unescaped token at the end of the JSON pointer
    /// @sa https://json.nlohmann.me/api/json_pointer/operator_slash/
@@ -315,7 +315,7 @@ class json_pointer
        result.reference_tokens.insert(result.reference_tokens.end(), lhs.reference_tokens.begin(), lhs.reference_tokens.end());
        result.reference_tokens.push_back(std::move(token));
        return result;
-    }
+    } // LCOV_EXCL_LINE (exception cleanup only)

    /// @brief create a new JSON pointer by appending the array-index-token at the end of the JSON pointer
    /// @sa https://json.nlohmann.me/api/json_pointer/operator_slash/
@@ -2180,7 +2180,7 @@ class json_pointer
                    {
                        // create an entry in the array
                        current = &current->operator[](array_index<BasicJsonType>(token));
-                        break;
+                        break; // LCOV_EXCL_LINE (needs an array index with 10 or more digits: more than 1e9 elements)
                    }

                    /*
@@ -2217,7 +2217,7 @@ class json_pointer
        json_pointer<string_t> result;
        result.reference_tokens = reference_tokens;
        return result;
-    }
+    } // LCOV_EXCL_LINE (exception cleanup only)

    json_pointer<string_t> convert()&&
    {